Musnad Abu Ya'la al-Mawsili 116:32

Ahmad narrated to us, Hajjaj ibn Muhammad narrated to us, he said: Shu'bah narrated to me, he said: I heard Qatadah, from Anas ibn Malik, who said: The Messenger of Allah (ﷺ) said to Ubayy ibn Ka'b when "Those who disbelieved" (Surah al-Bayyinah) was revealed: "Indeed, Allah has commanded me to recite 'Those who disbelieved' to you." He said: "Did He name me to you?" He said: "Yes." He said: "So he wept."