We went out along with the Messenger of Allah ﷺ for some battle in intense heat, so much so that one of us placed his hand on his head, or placed his palm on his head, due to intense heat, No one of us fasted except the Messenger of Allah ﷺ and 'Abd Allah b. Rawahah.
خَرَجْنَا مَعَ رَسُولِ اللَّهِ ﷺ فِي بَعْضِ غَزَوَاتِهِ فِي حَرٍّ شَدِيدٍ حَتَّى إِنَّ أَحَدَنَا لَيَضَعُ يَدَهُ عَلَى رَأْسِهِ أَوْ كَفَّهُ عَلَى رَأْسِهِ مِنْ شِدَّةِ الْحَرِّ مَا فِينَا صَائِمٌ إِلاَّ رَسُولُ اللَّهِ ﷺ وَعَبْدُ اللَّهِ بْنُ رَوَاحَةَ