Sahih Muslim 1122a
Abu Darda' (Allah be pleased with him) reported: We set out during the month of Ramadan with the Messenger of Allah ﷺ in such an intense heat that one of us would place his hand over his head (in order to protect himself) against the excessive heat, and none among us was observing the fast, except the Messenger of Allah ﷺ and 'Abdullah b. Rawaha.
حَدَّثَنَا دَاوُدُ بْنُ رُشَيْدٍ، حَدَّثَنَا الْوَلِيدُ بْنُ مُسْلِمٍ، عَنْ سَعِيدِ بْنِ عَبْدِ الْعَزِيزِ، عَنْ إِسْمَاعِيلَ، بْنِ عُبَيْدِ اللَّهِ عَنْ أُمِّ الدَّرْدَاءِ، عَنْ أَبِي الدَّرْدَاءِ، - رضى الله عنه - قَالَ خَرَجْنَا مَعَ رَسُولِ اللَّهِ ﷺ فِي شَهْرِ رَمَضَانَ فِي حَرٍّ شَدِيدٍ حَتَّى إِنْ كَانَ أَحَدُنَا لَيَضَعُ يَدَهُ عَلَى رَأْسِهِ مِنْ شِدَّةِ الْحَرِّ وَمَا فِينَا صَائِمٌ إِلاَّ رَسُولُ اللَّهِ ﷺ وَعَبْدُ اللَّهِ بْنُ رَوَاحَةَ .