Sahih Muslim , Book 4, Hadith 1012 (USC-MSA) ⓘ
Ibn 'Umar said: The Apostle of Allah used to place his camel (towards the Ka'ba) and said prayer in its direction.
حَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا مُعْتَمِرُ بْنُ سُلَيْمَانَ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ يَعْرِضُ رَاحِلَتَهُ وَهُوَ يُصَلِّي إِلَيْهَا .
also referenced under: Book 4, Hadith 279 (In-Book) & Hadith 502 (Reference)