This hadeeth comes under the following chapter: HOW THE LIMBS SHOULD WORK IN PROSTRATION AND FORBIDDANCE TO FOLD CLOTHING AND HAIR AND PLAITING OF HAIR IN THE PRAYER
Ibn Abbas reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) 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, bands, knees and feet.