Narrated Ibn `Abbas:
The Prophet (ﷺ) was ordered (by Allah) to prostrate on seven parts and not to tuck up the clothes or hair (while praying). Those parts are: the forehead (along with the tip of nose), both hands, both knees, and (toes of) both feet.
Reference | : Sahih al-Bukhari 809 |
In-book reference | : Book 10, Hadith 204 |
USC-MSA web (English) reference | : Vol. 1, Book 12, Hadith 773 |
(deprecated numbering scheme) |