Hadith: 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 أَنَسِ بْنِ مَالِكٍ رضي الله عنه:

أَنَّ رَسُولَ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا سَافَرَ فَأَرَادَ أَنْ يَتَطَوَّعَ اسْتَقْبَلَ بِنَاقَتِهِ الْقِبْلَةَ فَكَبَّرَ، ثُمَّ صَلَّى حَيْثُ وَجَّهَهُ رِكَابُهُ.
[صحيح] - [رواه أبو داود]

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.
[Authentic hadith] - [Narrated by Abu Daoud]

Explanation

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.

Benefits from the Hadith