وَعَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: كَانَ ذَلِكَ قَدْ فَعَلَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَصَرَ الصَّلَاةَ وَأَتَمَّ. رَوَاهُ فِي شرح السّنة

Anas said that when God’s Messenger was on a journey and wished to say voluntary prayers he made his she-camel face the qibla and said, “God is most great,” then prayed in whatever direction his mount made him face. Abu Dawud transmitted it.