Narrated Abu al-Darda: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

English translation · Sunan Abu Dawud