شروط الصلاة
Anas (may Allah be pleased with him) reported: When the Messenger of Allah (may Allah's peace and blessings be upon him) was on a journey and wished to offer voluntary prayers, he made his she-camel face the Qiblah, said Takbīr, and then prayed towards whatever direction his mount would face.
عن أنس -رضي الله عنه-: أن رسول الله -صلى الله عليه وسلم- كان إذا سافر فَأراد أن يَتَطَوَّع استقْبَل بِنَاقَتِه القِبْلَة, فكبَّر، ثم صلَّى حيث كان وجَّهَه رِكَابُهُ.
شرح الحديث :
Whenever the Prophet (may Allah's peace and blessings be upon him) was on a journey and wanted to offer a voluntary prayer, he would face the Qiblah on his mount while reciting the Takbīr of Ihrām, and then he would pray in whatever direction he was heading to.