Sunan At-Tirmidhi

Abdur-Rahman bin Ka'b bin Malik narrated that:Jabir bin Abdullah informed him that the Prophet had put two men together in one cloth from those who were killed at (the battle of) Uhud, then he said: ""Which of them memorized the more of the Qur'an?"" When one of them was indicated to him, he put him in the Lahd (first) and said: ""I am a witness for those people on the Day of Judgment."" And he ordered that they be buried in their blood, and that they not be prayed over, nor washed