The Messenger of Allah ﷺ was commanded to prostrate on seven bones, and he was forbidden from tucking up his hair or his clothes.
حدثنا سفيان عن عمرو عن طاوس
أمر رسول الله ﷺ أن يسجد على سبع ونهي أن يكف شعره وثيابه
Its isnad is sahih, and Bukhari and Muslim and others narrated it. See al-Muntaqa 966-968. It will come again at 1940, 2300, 2436. See also 1769.