Abu Dawud
Dialects And Readings Of The Quran
Book Number: 025 / Hadith Number: 3988
Narated By Abu Sa'id al-Khudri : The Apostle of Allah (pbuh) mentioned the name of the one who will sound the trumpet (sahib as-sur) and said: On his right will be Jibra'il and on his left will be Mika'il.