It wasnarrated from Jabir bin 'Abdullah that the Messenger of Allah(ﷺ)used to put two or three of the slain of Uhud in one shroud. Hewouldask:
"Which of them had memorized more Qur'an?" And if one ofthem was pointed out to him, he would put him in the niche-gravefirst. And he said: "I am a witness over them." He commanded thattheyshould be buried with their blood, and that the funeral prayershouldnot be offered for them and they should not be washed.
English reference: Vol. 1, Book 6, Hadith 1514
Arabic reference: Book 6, Hadith 1581