Musnad Ahmad 770:24

Hashim ibn al-Qasim narrated to us, Shu'bah narrated to us, he said: I heard 'Awn ibn Abi Juhayfah say: I heard Mundhir ibn Jarir narrating 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, and he mentioned it, except that he said: And he ordered Bilal, so he gave the Adhan, then he entered, then he came out, and he prayed, and he said: As if it were gilded.