سنن النسائي

It was narrated that Hisham bin 'Amir said: "My father was killed on the day of Uhud, and the Prophet (ﷺ) said: 'Dig graves and make them good and wide, and bury two or three in a grave, and put in first the one who knew the Qur'an most.' My father was the third of three, and the one who knew the Qur'an most was placed (in the grave) first."