Kulayb bin Shahab كليب بن شهاب · The Book on Salat (Prayer)

"I saw Allah's Messenger when he prostrated placing his knees (on the ground) before his hands, and when he got up, he raised his hands before his knees."

"I arrived in Al-Madinah and I said, 'Let me look at the Salat of Allah's Messenger.' When he sat - meaning for At-Tashah-hud - he spread his left foot, and placed his left hand - meaning on his left thigh - and held his right foot erect."