Musannaf Ibn Abi Shayba 27:23

Narrated to us Abd al-Rahim ibn Sulayman, from Muhammad ibn Ishaq, from Abdullah ibn Rafi, from Umm Salama, who said: I heard the Messenger of Allah, may Allah bless him and grant him peace, upon this pulpit saying: "I am your predecessor at the Hawd (the Basin/Al-Kawthar)."