Volume 1, Book 12, Number 773:
Narrated Ibn ‘Abbas:
The Prophet 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.
Volume 1 – 191 / 1700
SAHIH BUKHARI VOLUME 1 > BOOK 12: CHARACTERISTICS OF PRAYER