Musnad Ahmad 1153:1729

Waki’ narrated to us, Muhammad ibn ‘Imran al-Hajabi narrated to me, he heard it from Safiyyah bint Shaybah, from ‘Aishah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "My name is permitted, but my kunyah (patronymic) is forbidden," or "My kunyah is forbidden, and my name is permitted."