It wasnarrated from 'Abbas bin 'Abdul-Muttalib that he heard theProphet (ﷺ) say:
"When a person prostrates, seven parts of hisbodyprostrate with him: His face, his two hands, his two knees, andhistwo feet." (TR)
English reference (TR): Vol. 1, Book 5, Hadith 885 (TR)
Arabic reference (TR): Book 5, Hadith 935 (TR)