Musnad Ahmad

Narrated to us Aswad ibn ‘Amir, narrated to us Shu‘bah, from ‘Asim ibn Kulayb, he said: I heard my father narrate, from Wa’il ibn Hujr al-Hadrami: that he saw the Messenger of Allah, peace and blessings be upon him, pray, and he mentioned it, and he said in it: and he placed his right hand over his left. He said: and Shu‘bah added in it another time: when he was in bowing (ruku‘), he placed his hands on his knees, and he spread apart (his arms) in bowing.