Musannaf Ibn Abi Shayba 3:1741

Husayn ibn Ali narrated to us, from Za’idah, from Asim, who said: Abu Ubaydah led a people in prayer one time. When he finished, he said: "The devil did not cease to be upon me just now until I saw that I had superiority over those behind me. I will never lead [a prayer] ever again."