He heard the Messenger of Allah ﷺ say, "When a servant prostrates, seven limbs prostrate with him: his face, his two hands, his two knees, and his two feet."
أنه سمع رسول الله ﷺ يقول: إذا سجد العبد سجد معه سبعة أطراف: وجهه وكفاه وركبتاه وقدماه.
Muslim narrated it in "the Book of Prayer" (491) from Qutayba bin Saeed, who said that Bakr (Ibn Mudar) narrated to them from Ibn Hadi, from Muhammad bin Ibrahim, from Amir bin Saad, from Abbas bin Abdul-Muttalib, mentioning it as stated.It appears that this hadith is missing from some copies of Sahih Muslim, since Zaylai in Nasb Raya (1/383) attributed it to the four compilers of the Sunan. So take note.