صحيح البخاري
Sahih Bukhari
كتاب العمل في الصلاة
The Book of Dealing With Actions In As-Salat (The Prayer)
باب من رجع القهقرى فى صلاته، أو تقدم بأمر ينزل به:
Chapter. Whoever came back or went forward during the Salat (prayer) because of some urgent need.
