The Prophet ﷺ was commanded to prostrate on seven bones and was forbidden to tuck up his hair or his garment.
قال حدثنا سفيان عن ابن طاوس عن أبيه
أمر النبي ﷺ أن يسجد على سبع ونهي أن يكف شعرا أو ثوبا
Its isnad is sahih. Ibn Tawus is Abdullah bin Tawus, who is trustworthy, one of the finest servants of Allah in virtue, devotion, and religion. The hadith is a repetition of 1927, and will come again at 2300 and 2436.