The Ansar came to the Messenger of Allah (ﷺ) on the day of Uhud and said: We have been afflicted with wound and fatigue. What do you command us?

He said: Dig graves, make them wide, bury two or three in a single grave.

He was asked: Which of them should be put first?

He replied: The one who knew the Qur'an most.

He (Hisham) said: My father Amir died on the day and was buried with two or one.
Sunan Abi Dawud Book 21, Hadith 127