Musnad Abu Ya'la al-Mawsili 3:211

'Abdullah ibn 'Umar ibn Aban and Abu Hisham al-Rifa'i narrated to us, they said: Ibn Fudayl narrated to us, he said: Mujalid narrated to us, from al-Sha'bi, from al-Harith, from 'Ali, who said: "There was nothing for us on the night Fatima was gifted to me to sleep upon except the skin of a ram."