Musnad Abu Ya'la al-Mawsili 209:34

Hawthara ibn Ashras Abu 'Amir narrated to us, he said: Uqba informed me, from Shahr ibn Hawshab, from Umm Salama, the wife of the Prophet, may Allah bless him and grant him peace, that the Messenger of Allah, may Allah bless him and grant him peace, said to Fatima: "Bring me your husband and your two sons." So she brought them, and the Messenger of Allah, may Allah bless him and grant him peace, cast over them a cloak that was under me, a Khaybari one which we had obtained from Khaybar. Then he said: "O Allah, these are the family of Muhammad, may peace be upon him. So place Your prayers and Your blessings upon the family of Muhammad, just as You placed them upon the family of Ibrahim. Indeed, You are Praiseworthy, Glorious." Umm Salama said: So I lifted the cloak to enter with them, but the Messenger of Allah, may Allah bless him and grant him peace, pulled it from my hand and said: "You are upon good."