Musnad Ahmad 937:197

Abu Kamil narrated to us, Hammad narrated to us, Abu Na’amah al-Sa’di narrated to us, and he mentioned it with his chain of narration and its meaning, but he did not mention: "except for something they heard from their Prophet, may Allah bless him and grant him peace." And I do not see ‘Affan except as having erred, and he went to the hadith of Abu al-Ashhab, because ‘Affan added it, and it was not with us.