Musannaf Ibn Abi Shaybah 2546 — Those who used to say: when you bow

Sayyiduna Wa'il bin Hujr (may Allah be pleased with him) said: I was among those who came to the Prophet (peace and blessings be upon him), and I said to myself: I will certainly observe how the Prophet (peace and blessings be upon him) prays. So I saw that when he (peace and blessings be upon him) intended to bow, he raised both his hands, then bowed, then placed both his hands on his knees.