diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_patch.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_patch.py
index e8ca551d09f9..c7508657d16c 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_patch.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_patch.py
@@ -74,7 +74,7 @@ def __init__(
             self._publish = self._client.send  # type:ignore[attr-defined]
         else:
             if isinstance(credential, AzureSasCredential):
-                raise TypeError("SAS token authentication is not supported for the standard client.")
+                raise TypeError("SAS token authentication is not supported for Event Grid Namespace.")
             super().__init__(
                 endpoint=endpoint,
                 credential=credential,
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_patch.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_patch.py
index 48d1d0153d57..5081e0bc79e0 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_patch.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_patch.py
@@ -72,7 +72,7 @@ def __init__(
             self._publish = self._client.send  # type: ignore[attr-defined]
         else:
             if isinstance(credential, AzureSasCredential):
-                raise TypeError("SAS token authentication is not supported for the standard client.")
+                raise TypeError("SAS token authentication is not supported for Event Grid Namespace.")
 
             super().__init__(
                 endpoint=endpoint,