Musnad Ahmad 1034:60

Surayj ibn al-Nu'man narrated to us, Hammad narrated to us, from 'Abd al-Malik ibn 'Umayr, a cousin of Hudhayfah narrated to me, from Hudhayfah, who said: I stood with the Messenger of Allah (peace and blessings of Allah be upon him) one night, and he recited the seven long surahs in seven rak'ahs. When he raised his head from bowing, he would say: "Allah hears those who praise Him." Then he would say: "Praise be to Allah, the Possessor of the Kingdom, the Might, the Pride, and the Greatness." His bowing was like his standing, and his prostration was like his bowing. He departed, and my legs were nearly broken.