Musannaf Ibn Abi Shayba 9:1786

Yazid ibn Harun narrated to us, he said: Mahdi ibn Maymun informed us, from Muhammad ibn Abd Allah ibn Abi Ya'qub, from al-Hasan ibn Sa'd, he said: Rabah al-Habashi narrated to me, from Uthman, that the Messenger of Allah, may Allah bless him and grant him peace, decreed that the child belongs to the bed.