Musnad Ahmad 770:6

Hashim ibn al-Qasim narrated to us, Shu'bah narrated to us, he said: I heard 'Awn ibn Abi Juhayfah, I heard Mundhir ibn Jarir al-Bajali, from his father, he said: We were with the Messenger of Allah, may Allah bless him and grant him peace, at the beginning of the day. He mentioned it, except that he said: So he ordered Bilal, and he gave the Adhan. Then he entered, then he came out to pray. And he said: As if it were gilded.