Sahih Bukhari Volume 8, Book 76, Hadith Number 455.

Narated By Abu Wail : We paid a visit to Khabbab who was sick, and he said, “We migrated with the Prophet for Allah’s Sake and our wages became due on Allah. Some of us died without having received anything of the wages, and one of them was Mus’ab bin ‘Umar, who was martyred on the day of the battle of Uhud, leaving only one sheet (to shroud him in). If we covered his head with it, his feet became uncovered, and if we covered his feet with it, his head became uncovered. So the Prophet ordered us to cover his head with it and put some Idhkhir (a kind of grass) over his feet. On the other hand, some of us have had the fruits (of our good deed) and are plucking them (in this world).”