Musnad Ahmad 435:41

Rawh narrated to us, Malik and Muhammad ibn Abi Hafsah narrated to us, from Ibn Shihab, from Humayd ibn Abd al-Rahman, that he heard Mu'awiyah ibn Abi Sufyan, on the day of Ashura, in the year he performed Hajj, while he was on the pulpit, and he mentioned the hadith.