Musannaf Ibn Abi Shayba 36:221

Abu Mu'awiyah narrated to us, from al-A'mash, from Shaqiq, from Khabbab, who said: We migrated with the Messenger of Allah (may Allah bless him and grant him peace) seeking the Face of Allah, so our reward became incumbent upon Allah. Among us were those who passed away and did not consume anything of their reward. Among them was Mus'ab ibn Umayr, who was killed on the day of Uhud. Nothing was found to shroud him in except a striped garment; when they placed it over his head, his feet would emerge, and when they placed it over his feet, his head would emerge. The Messenger of Allah (may Allah bless him and grant him peace) said: "Place it over the part that covers his head, and place some *idhkhir* (lemon grass) over his feet." And among us were those whose fruit had ripened, and he is harvesting it.