Musnad Abu Ya'la al-Mawsili 145:2

Abu Khaythama narrated to us, Mu'adh ibn Hisham narrated to us, from his father, from Shu'bah ibn al-Habhab, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) married Safiyyah bint Huyayy, and he gave her as her dowry her manumission.