Musnad Ahmad 32:1498

'Abd al-Wahhab narrated to us, from Sa'id, from Qatadah, from Anas, from the Prophet (peace and blessings of Allah be upon him), that he said to Ubayy: "Indeed, Allah has commanded me to recite the Qur'an to you." He said: "Has Allah named me to you?" He said: "Yes." So he began to weep.