Musannaf Ibn Abi Shayba 17:529

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Shu’bah, from Muhammad ibn al-Munkadir, from Jabir, who said: I sought permission to enter upon the Prophet, peace be upon him. He said, "Who is this?" I said, "I." The Prophet, peace be upon him, said, "I, I."