(138) باب لاَ يَكُفُّ ثَوْبَهُ فِي الصَّلاَةِ
Narrated Ibn `Abbas:
The Prophet (ﷺ) said, "I have been ordered to prostrate on seven (bones) and not to tuck up the hair or garment."
Reference: Sahih al-Bukhari 816
In-book reference: Book 10, Hadith 211
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 12, Hadith 780