Musnad Abu Ya'la al-Mawsili 209:89

Abu Khaythama narrated to us, Jarir narrated to us, from Layth, from Alqama bin Marthad, from al-Ma'rur bin Suwayd, from the Mother of the Believers, Umm Salama, who said: I asked the Messenger of Allah, may Allah bless him and grant him peace, about those who were transformed (into animals): do they have offspring? He said: "No one was ever transformed, such that they had offspring or descendants."