Sayyiduna Khabbab (may Allah be pleased with him) said: We are a people who emigrated with the Messenger of Allah (peace and blessings be upon him), so our reward became due upon Allah. Among us was one who was taken (from this world) without consuming anything of his reward; among them was Sayyiduna Mus'ab bin Umayr (may Allah be pleased with him). He was martyred on the day of Uhud, and nothing was found for him except a striped woollen cloak. When his head was covered with it, his feet were exposed, and when his feet were covered with it, his head was exposed. This was mentioned to the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Cover his head with it and place idhkhir grass over it." And among us are those whose fruit has ripened for them and they are picking it.
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3647