Abu Qatada ibn Rab'i · The Book of Funerals

a funeral passed by them and one of them stood and the other sat. The one who stood up said: "By Allah, I know that the Messnger of Allah stood up." The one who was sitting said: "I know that the Messenger of Allah sat."

the Messenger of Allah put two men from those who had been slain in Uhud in one shrud, then he would ask which of them had learned more Qur'an and when one of them was pointed out, he would put him in the Lahd (grave) first. He said: "I am a witness to these." And he ordered that they be buried with their blood, and that the funeral prayer should not be offered, and they should not be washed.