Khabab reported,

We migrated with the Prophet ﷺ seeking the pleasure of Allah, so our reward became due upon Allah. Among us were those who passed away without consuming any of their reward in this world. One of them was Musab bin Umayr, who was killed on the day of Uhud. He left behind nothing but a striped cloak. When we covered his head with it, his feet became exposed, and when we covered his feet, his head became exposed. So the Prophet ﷺ said to us, "Cover his head with it and place idhkhir grass over his feet," or he said, "Throw some idhkhir over his feet."And among us are those whose fruits have ripened, and they are now harvesting them.

Bukhari 4082

Sahih

حدثنا أحمد بن يونس حدثنا زهير حدثنا الأعمش عن شقيق

عن خباب رضي الله عنه قال

هاجرنا مع النبي ﷺ ونحن نبتغي وجه الله فوجب أجرنا على الله فمنا من مضى أو ذهب لم يأكل من أجره شيئا كان منهم مصعب بن عمير قتل يوم أحد فلم يترك إلا نمرة كنا إذا غطينا بها رأسه خرجت رجلاه وإذا غطي بها رجلاه خرج رأسه فقال لنا النبي ﷺ غطوا بها رأسه واجعلوا على رجليه الإذخر أو قال ألقوا على رجليه من الإذخر ومنا من أينعت له ثمرته فهو يهدبها

البخاري 4082صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Expeditions
Chapter
Those killed among the Muslims on the day of Uhud
Numbering
Darussalam 4082
Bukhari 4082