Khabab reported,

We migrated with the Messenger of Allah ﷺ seeking the pleasure of Allah, so our reward fell due upon Allah. Among us were those who died without taking any of their reward in this world, and among us were those whose fruits ripened so that they are now harvesting them.Musab bin Umayr died and left nothing but a single garment. When they covered his head with it, his feet became exposed, and when they covered his feet with it, his head became exposed. So the Messenger of Allah ﷺ said, "Cover his head with it and place idhkhir grass over his feet."

حدثنا محمود بن غيلان حدثنا أبو أحمد حدثنا سفيان عن الأعمش عن أبي وائل

عن خباب قال

هاجرنا مع رسول الله ﷺ نبتغي وجه الله فوقع أجرنا على الله فمنا من مات ولم يأكل من أجره شيئا ومنا من أينعت له ثمرته فهو يهدبها وإن مصعب بن عمير مات ولم يترك إلا ثوبا كانوا إذا غطوا به رأسه خرجت رجلاه وإذا غطوا به رجليه خرج رأسه فقال رسول الله ﷺ غطوا رأسه واجعلوا على رجليه الإذخر