Mukhtasar Muslim (Abridged) 299 — On how many limbs to prostrate

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings of Allah be upon him) said: I have been commanded to prostrate on seven bones: on the forehead—and he (peace be upon him) pointed with his hand towards his nose—and on both hands, and on both knees, and on the toes of both feet, and I have been forbidden to gather up the clothes and hair.