Musnad Ahmad 32:2088

'Affan and Bahz narrated to us, they said: Hammam narrated to us, from Qatadah, from Anas, that the Prophet (peace and blessings of Allah be upon him) called Ubayy and said: "Indeed, Allah has commanded me to recite to you." He said: "Did He name me to you?" He said: "Allah named you to me." So he began to weep.