32 – Abu Sufyan narrated, from Abu Nadrah, who said: The Messenger of Allah ﷺ said, “When any of you goes into prostration, let him not stretch out his legs, for a human being prostrates on seven bones: his forehead, his hands, his knees, his legs, and his feet.”

In another wording: “When any of you prostrates, let him not extend his back.”

Yet another report states: The Messenger of Allah ﷺ forbade a man to stretch out his back during prostration.