Yes, internet is my primary source, because history or religious studies is not my profession. But I follow the Mazhab of Ahle Bait, and you do not. And your lack of connection to them is the main reason your arguments would make no sense, even if you read books after books in libraries.
Tum pehle barr-bolay nahin ho. Tum se pehle bhi kayi dekhe hein.
Anyway. This khutbah is recorded by Abu Tahir Tayfur al-Baghdadi, a prolific ninth century historian, in one of his books “Balaghatun Nisa”.
Abu Tahir was the first person to write a history of Baghdad. There is a book on him by Shawkat Toorawa.
Ibn Abī Ṭāhir Ṭayfūr and Arabic … - Google Books
“Ibn Abī Ṭāhir Ṭayfūr and Arabic writerly culture: a ninth-century bookman in Baghdad”.