Musannaf Ibn Abi Shayba 27:729

Ghundar narrated to us, from Shu'bah, from 'Amr ibn Murrah, who said: I heard Abu Hamzah say: The Ansar said, "O Messenger of Allah, every prophet has followers, and we have followed you, so supplicate to Allah to make our followers from among us." So he supplicated for them that their followers be made from among them. He said: I conveyed that to 'Abd al-Rahman ibn Abi Layla, and he said: Zayd has indeed claimed that.