صحيح البخاري
Sahih Bukhari
كتاب الصلاة
The Book of As-Salat (The Prayer)
باب ما جاء فى القبلة، ومن لا يرى الإعادة على من سها فصلى إلى غير القبلة:
Chapter. What has been said about (facing) the Qiblah (Kabah at Makkah) and whoever considered that there was no need to repeat the Salat (prayer) if someone offered prayers by mistake facing a direction other than that of the Qiblah.