صحیح ابن حبان
Ibn Hibban
كتاب الصلاة
Book of Prayer
فصل في الصلاة على الدابة - ذكر الإباحة للمسافر أن يصلي النافلة على راحلته وإن كانت القبلة وراء ظهره
Section on prayer on a riding animal – mentioning permission for a traveler to pray voluntary prayers on his mount even if the qiblah is behind him
1 hadith
Hadith 2520
Sayyiduna Jabir bin Abdullah (may Allah be pleased with both of them) narrates: I saw the Prophet Muhammad (peace and blessings be upon him) performing prayer on his mount facing towards the east during the expedition of Anmar.