Musnad Ahmad 33:71

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us. And Hajjaj narrated to us, he said: Shu‘bah narrated to me, he said: I heard Qatadah narrating from Salim ibn Abi al-Ja‘d. Hajjaj said in his narration: He said: I heard Salim from Jabir ibn ‘Abd Allah al-Ansari, that a man from the Ansar had a boy born to him, and he wanted to name him Muhammad. So he came to the Prophet, peace and blessings of Allah be upon him, and asked him. He said: "The Ansar have done well. Name yourselves with my name, but do not use my kunyah (patronymic)."