“Which of them had memorized more Qur’an?” And if one of
them was pointed out to him, he would put him in the niche-grave
first. And he said: “I am a witness over them.” He commanded that
they
should be buried with their blood, and that the funeral prayer
should
not be offered for them and they should not be washed.
Sunan Ibn Majah Book 6, Hadith 82