صحيح البخاري
Sahih Bukhari
كتاب العمل في الصلاة
The Book of Dealing With Actions In As-Salat (The Prayer)
باب استعانة اليد فى الصلاة إذا كان من أمر الصلاة:
(1) Chapter. To take the help of the hands while offering Salat (prayer) on condition that the movement should be in line with the rules of the Salat (prayer).