Musnad Ahmad 30:152

Sufyan narrated to us, from al-Zuhri, who heard Ibn Akimah narrating to Sa'id ibn al-Musayyib, saying: I heard Abu Hurayrah saying: The Messenger of Allah (peace and blessings of Allah be upon him) led us in a prayer, which we thought was the morning prayer. When he finished his prayer, he said: "Did any of you recite?" A man said: I did. He said: "I say, why am I being disputed regarding the Qur'an?" Ma'mar said, from al-Zuhri: "So the people refrained from reciting in that in which the Messenger of Allah (peace and blessings of Allah be upon him) recited aloud." Sufyan said: "This statement was hidden from me."