وَلِأَبِي دَاوُدَ: مِنْ حَدِيثِ أَنَسٍ: «كَانَ إِذَا سَافَرَ فَأَرَادَ أَنْ يَتَطَوَّعَ اِسْتَقْبَلَ بِنَاقَتِهِ اَلْقِبْلَةِ، فَكَبَّرَ، ثُمَّ صَلَّى حَيْثُ كَانَ وَجْهَ رِكَابِهِ» وَإِسْنَادُهُ حَسَنٌ. 11 حسن
When traveled, and intended to pray a voluntary prayer, he used to direct his riding camel towards the Qiblah, say, “Allahu Akbar” and pray facing whatever direction it faced.
Bulugh al-Maram 255, Book 2, The Book of Prayer, Hadith 76. 1 min read