Musnad Ahmad 30:1134

Hashim ibn al-Qasim narrated to us, Ibn Abi Dhi'b narrated to us, from al-Maqburi, from Abu Hurayrah, who said: I am the most similar of you in prayer to the Messenger of Allah, may Allah bless him and grant him peace. When the Messenger of Allah, may Allah bless him and grant him peace, said: "Allah hears those who praise Him," he would say: "Our Lord, and to You is the praise." He would say "Allah is the Greatest" when he bowed, when he raised his head, and when he stood up from the two prostrations.