Abu Qatadah (RA) reported that when the Messenger of Allah (ﷺ) was in a journey he got down for rest at night, and he used to lie down on his right side, and when he lay down for rest before the dawn, he used to stretch his forearm and place his head over his palm.
Explanation & Benefits
Shaykh Maulana Abdul Aziz Alvi
Hadith Commentary: Benefits and Issues: If a person feels the need to rest near the time of dawn, he should avoid lying down in such a manner that he falls into a deep sleep. Rather, he should rest while sitting in such a way that waking up for the prayer becomes easy.
Source: Tuhfat al-Muslim: Commentary on Sahih Muslim, Page: 1565