أَخْبَرَنَا مُحَمَّدُ بْنُ مَعْمَرٍ، قَالَ حَدَّثَنَا وَهْبُ بْنُ جَرِيرٍ، قَالَ حَدَّثَنَا أَبِي قَالَ، سَمِعْتُ حُمَيْدَ بْنَ هِلاَلٍ، عَنْ سَعْدِ بْنِ هِشَامِ بْنِ عَامِرٍ، عَنْ أَبِيهِ، قَالَ ‏:‏ لَمَّا كَانَ يَوْمُ أُحُدٍ أُصِيبَ مِنَ الْمُسْلِمِينَ، وَأَصَابَ النَّاسَ جِرَاحَاتٌ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏:‏ ‏"‏ احْفِرُوا وَأَوْسِعُوا، وَادْفِنُوا الاِثْنَيْنِ وَالثَّلاَثَةَ فِي الْقَبْرِ، وَقَدِّمُوا أَكْثَرَهُمْ قُرْآنًا ‏"‏ ‏.‏

It was narrated from Sa'eed bin Hisham bin 'Amir that his father said: "On the day of Uhud some of the people among the Muslims were killed, and people were wounded. The Messenger of Allah said: 'Dig graves and make them wide, and bury two or three in a grave, and put the one who knew more Qur'an in first."' Translation Not Available

Book Ref: Sunan An Nisai Book 21 Hadith 2011
Web Ref:  Sunan An Nisai Vol 3 Book 21 Hadith 2013