Musnad Ahmad Hadith 21077

It is narrated from Khabbab (may Allah be pleased with him) that we migrated with the Prophet (peace be upon him) solely for the pleasure of Allah, therefore our reward is with Allah. Now, some of us have departed from this world and did not partake of any of their reward. Among them was Mus'ab bin Umair, who was martyred at the Battle of Uhud, and we could not find anything to shroud him with except a single sheet. If we covered his head, his feet would remain uncovered, and if we covered his feet, his head would remain uncovered. The Prophet (peace be upon him) instructed us to cover his head and place a type of grass called 'izkhir' on his feet. And among us are some people whose fruits have ripened and they are gathering them.