Jami` at-Tirmidhi 3853

Narrated Khabbab:"We emigrated with the Messenger of Allah (ﷺ), seeking the Face of Allah. So our reward is with Allah. Among us were those who died and did not consume any of the rewards (in this life), and among us were those who lived to see its fruits and tend to them. Verily, Musab bin 'Umair died without leaving anything behind but a garment. When they covered his head with it, his feet would become exposed, and when they covered his feet with it, his head will become exposed. So the Messenger of Allah (ﷺ) said: 'Cover his head and place Al-Idhkir over his feet