Hadith 1925
Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace and blessings be upon him) said: "I have been commanded to prostrate on seven bones: the forehead—he also pointed with his blessed hand towards his nose—both hands, both knees, and the toes of both feet. And I should not gather up the clothes or the hair (during prayer)."