Musnad Ahmad 1034:1

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Sulayman—meaning al-A'mash—from Sa'd ibn 'Ubaydah, from al-Mustawrid, from Silah, from Hudhayfah, who said: I prayed with the Messenger of Allah, may Allah bless him and grant him peace, and he would say in his bowing: "Glory be to my Lord, the Magnificent," and in his prostration: "Glory be to my Lord, the Most High." He said: And he did not pass by a verse of mercy except that he stopped at it and asked, and [he did not pass by] a verse of punishment except that he sought refuge from it.