Is the following Khutba authentic by chain?
Letter 58: Written to the people of various localities deseribing what took place between him and the people of Siffin
The whole thing began thus that we and the Syrians met in an encounter although we believe in one and the same Allah and the same Prophet, and our message in Islam is the same. We did not want them to add anything in the belief in Allah or in acknowledging His Messenger (Allah bless him and his descendants) nor did they want us to add any such thing. In fact, there was complete unity except that we diffe