"When a person prostates, he prostates on seven part of the body: His face, his hands, his knees and his feet."
Sahih Muslim Book 4, Hadith 262
← Previous Hadith The Messenger of Allah (ﷺ) said: I was commanded to prostrate myself on the seven (bones) and forbidden to fold back hair and clothing. (The seven bones are): forehead, nose, hands, knees and feet.

Sahih Muslim Book 4, Hadith 261 Next Hadith → Why is it that you touched my head? He (Ibn 'Abbas) replied: (The man who observes prayer with plaited hair) is like one who prays with his hands tied behind.

Sahih Muslim Book 4, Hadith 263