diff --git a/docs/cmd/kn_source_apiserver_create.md b/docs/cmd/kn_source_apiserver_create.md
index f6b46adfb4..d9b84bcc71 100644
--- a/docs/cmd/kn_source_apiserver_create.md
+++ b/docs/cmd/kn_source_apiserver_create.md
@@ -30,7 +30,7 @@ kn source apiserver create NAME --resource RESOURCE --sink SINK
       --resource stringArray      Specification for which events to listen, in the format Kind:APIVersion:LabelSelector, e.g. "Event:v1:key=value".
                                   "LabelSelector" is a list of comma separated key value pairs. "LabelSelector" can be omitted, e.g. "Event:v1".
       --service-account string    Name of the service account to use to run this source
-  -s, --sink string               Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string               Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
 ```
 
 ### Options inherited from parent commands
diff --git a/docs/cmd/kn_source_apiserver_update.md b/docs/cmd/kn_source_apiserver_update.md
index c22a845fd6..e9672544c8 100644
--- a/docs/cmd/kn_source_apiserver_update.md
+++ b/docs/cmd/kn_source_apiserver_update.md
@@ -30,7 +30,7 @@ kn source apiserver update NAME
       --resource stringArray      Specification for which events to listen, in the format Kind:APIVersion:LabelSelector, e.g. "Event:v1:key=value".
                                   "LabelSelector" is a list of comma separated key value pairs. "LabelSelector" can be omitted, e.g. "Event:v1".
       --service-account string    Name of the service account to use to run this source
-  -s, --sink string               Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string               Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
 ```
 
 ### Options inherited from parent commands
diff --git a/docs/cmd/kn_source_binding_create.md b/docs/cmd/kn_source_binding_create.md
index 73f28d4ead..abb619f016 100644
--- a/docs/cmd/kn_source_binding_create.md
+++ b/docs/cmd/kn_source_binding_create.md
@@ -24,7 +24,7 @@ kn source binding create NAME --subject SUBJECT --sink SINK
       --ce-override stringArray   Cloud Event overrides to apply before sending event to sink. Example: '--ce-override key=value' You may be provide this flag multiple times. To unset, append "-" to the key (e.g. --ce-override key-).
   -h, --help                      help for create
   -n, --namespace string          Specify the namespace to operate in.
-  -s, --sink string               Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string               Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
       --subject string            Subject which emits cloud events. This argument takes format kind:apiVersion:name for named resources or kind:apiVersion:labelKey1=value1,labelKey2=value2 for matching via a label selector
 ```
 
diff --git a/docs/cmd/kn_source_binding_update.md b/docs/cmd/kn_source_binding_update.md
index 34d945e3be..821313786e 100644
--- a/docs/cmd/kn_source_binding_update.md
+++ b/docs/cmd/kn_source_binding_update.md
@@ -24,7 +24,7 @@ kn source binding update NAME
       --ce-override stringArray   Cloud Event overrides to apply before sending event to sink. Example: '--ce-override key=value' You may be provide this flag multiple times. To unset, append "-" to the key (e.g. --ce-override key-).
   -h, --help                      help for update
   -n, --namespace string          Specify the namespace to operate in.
-  -s, --sink string               Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string               Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
       --subject string            Subject which emits cloud events. This argument takes format kind:apiVersion:name for named resources or kind:apiVersion:labelKey1=value1,labelKey2=value2 for matching via a label selector
 ```
 
diff --git a/docs/cmd/kn_source_ping_create.md b/docs/cmd/kn_source_ping_create.md
index 261f9d51fb..14f10355ba 100644
--- a/docs/cmd/kn_source_ping_create.md
+++ b/docs/cmd/kn_source_ping_create.md
@@ -26,7 +26,7 @@ kn source ping create NAME --sink SINK
   -h, --help                      help for create
   -n, --namespace string          Specify the namespace to operate in.
       --schedule string           Optional schedule specification in crontab format (e.g. '*/2 * * * *' for every two minutes. By default fire every minute.
-  -s, --sink string               Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string               Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
 ```
 
 ### Options inherited from parent commands
diff --git a/docs/cmd/kn_source_ping_update.md b/docs/cmd/kn_source_ping_update.md
index 518041badc..fe09b8069d 100644
--- a/docs/cmd/kn_source_ping_update.md
+++ b/docs/cmd/kn_source_ping_update.md
@@ -26,7 +26,7 @@ kn source ping update NAME
   -h, --help                      help for update
   -n, --namespace string          Specify the namespace to operate in.
       --schedule string           Optional schedule specification in crontab format (e.g. '*/2 * * * *' for every two minutes. By default fire every minute.
-  -s, --sink string               Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string               Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
 ```
 
 ### Options inherited from parent commands
diff --git a/docs/cmd/kn_trigger_create.md b/docs/cmd/kn_trigger_create.md
index 1f722dfdf2..e5ea45bf12 100644
--- a/docs/cmd/kn_trigger_create.md
+++ b/docs/cmd/kn_trigger_create.md
@@ -29,7 +29,7 @@ kn trigger create NAME --sink SINK
   -h, --help               help for create
       --inject-broker      Create new broker with name default through common annotation
   -n, --namespace string   Specify the namespace to operate in.
-  -s, --sink string        Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string        Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
 ```
 
 ### Options inherited from parent commands
diff --git a/docs/cmd/kn_trigger_update.md b/docs/cmd/kn_trigger_update.md
index e2f7545e27..761bd5cc01 100644
--- a/docs/cmd/kn_trigger_update.md
+++ b/docs/cmd/kn_trigger_update.md
@@ -33,7 +33,7 @@ kn trigger update NAME
   -h, --help               help for update
       --inject-broker      Create new broker with name default through common annotation
   -n, --namespace string   Specify the namespace to operate in.
-  -s, --sink string        Addressable sink for events. You can specify broker, knative service or URI. Examples: '--sink broker:nest' for 'nest' broker, '--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), '--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. If prefix is not provided, it is considered as knative service.
+  -s, --sink string        Addressable sink for events. You can specify a broker, Knative service or URI. Examples: '--sink broker:nest' for a broker 'nest', '--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, '--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. If prefix is not provided, it is considered as a Knative service.
 ```
 
 ### Options inherited from parent commands
diff --git a/pkg/kn/commands/flags/sink.go b/pkg/kn/commands/flags/sink.go
index 546ee50f1a..a07c470752 100644
--- a/pkg/kn/commands/flags/sink.go
+++ b/pkg/kn/commands/flags/sink.go
@@ -38,11 +38,11 @@ func (i *SinkFlags) Add(cmd *cobra.Command) {
 		"s",
 		"",
 		"Addressable sink for events. "+
-			"You can specify broker, knative service or URI. "+
-			"Examples: '--sink broker:nest' for 'nest' broker, "+
-			"'--sink https://event.receiver.uri' for an URI (identified by 'http' or 'https'), "+
-			"'--sink ksvc:receiver' or '--sink receiver' for 'receiver' knative service. "+
-			"If prefix is not provided, it is considered as knative service.")
+			"You can specify a broker, Knative service or URI. "+
+			"Examples: '--sink broker:nest' for a broker 'nest', "+
+			"'--sink https://event.receiver.uri' for an URI with an 'http://' or 'https://' schema, "+
+			"'--sink 'ksvc:receiver' or simply '--sink receiver' for a Knative service 'receiver'. "+
+			"If prefix is not provided, it is considered as a Knative service.")
 
 	for _, p := range config.GlobalConfig.SinkMappings() {
 		//user configration might override the default configuration