Musnad Ahmad 1034:71

'Abd al-Razzaq narrated to us, Sufyan narrated to us, from al-A'mash, from Sa'd ibn 'Ubaydah, from Silah ibn Zufar, from Hudhayfah, that the Prophet, peace and blessings of Allah be upon him, when he passed by a verse of fear, he would seek refuge, and when he passed by a verse of mercy, he would ask. He said: And the Prophet, peace and blessings of Allah be upon him, when he bowed, he would say: "Glory be to my Lord, the Magnificent." And when he prostrated, he would say: "Glory be to my Lord, the Most High."