´Ibn Umar narrated:` "The Prophet performed Salat towards his she-camel, or his mount, and he would perform Salat while on his mount, whichever direction it was facing."
Hadith ReferenceSunan at-Tirmidhi / The Book on Salat (Prayer) / Hadith: 352
Hadith Gradingالألبانی:صحيح، صفة الصلاة // 55 //، صحيح أبي داود (691 - 1109)