صحيح البخاري
Sahih Bukhari
كتاب تقصير الصلاة
The Book of Abridged Or Shortened Prayers (At-Taqsir)
باب من تطوع فى السفر فى غير دبر الصلوات وقبلها:
Chapter. Whoever offered Nawafil (optional - non-obligatory) prayers, not after the compulsory Salat (prayer) but before it.
