Fiqh-us-Sunnah Volume 4, Funerals and Dhikr, Fiqh 4.033.
Section : Legal Status of the Shroud.
Shrouding the body of the deceased, even it be with just one piece of cloth, is a collective obligation (fard kifayah) of the Muslims. Bukhari narrated from Khabbab that he said: “We migrated with Allah’s Messenger, peace be upon him, seeking Allah’s pleasure, and we hope He will reward us for that. In the meanwhile some of us died and received no reward in this life. One of them was Musa’ab ibn ‘Umayr, who was killed in the Battle of Uhud. We did not find anything to shroud him in except a piece of cloth. When we covered his head, his feet would show, and if we covered his feet, his head would show. Allah’s Messenger, peace be upon him, ordered us to use the cloth to cover his head with it and cover his feet with some grass.” 66