Mishkat al-Masabih #746

Wa’il b. Hujr said that he saw the Prophet raise his hands when he began prayer. He said the takbir, then pulled his garment round him, then placed his right hand on his left. When he was about to bow he took his hands out of his garment, and after he had raised (them and said the takbir he bowed. When he said, “God listens to him who praises Him” he raised his hands, and when he prostrated himself he did it between his hands. Muslim transmitted it.