Jami` at-Tirmidhi 3163

Narrated Abu Hurairah:"While the Messenger of Allah (ﷺ) was returning from Khaibar he traveled during the night until he became sleepy and he sat down to rest. Then he said: 'O Bilal! Stand guard for us for the night.'" He said: 'So Bilal performed Salat, then he leaned against his mount facing the direction of (dawn awaiting) Fajr. His eyes overcame him until he slept, and not one of them awoke. The first of them to awaken was the Prophet (ﷺ) who said: 'O Bilal!' Bilal said: 'May my father be ransomed for you O Messenger of Allah! I was overtaken just as you were overtaken.' So the Messenger of Allah (ﷺ) said: 'Move out!' Then he kneeled to perform Wudu and to announce the standing for the Salat, then he performed Salat the same as he would when not traveling. Then he said: 'And establish the Salat for My rememberance (20:)