Translation
(21) Funerals (Kitab Al-Jana'iz)
كتاب الجنائز
(1160) Chapter: Should The Martyr Be Washed
(31) باب فِي الشَّهِيدِ يُغَسَّلُ
Sunan Abi Dawud 3139 
The tradition mentioned above has also been transmitted by al-Laith through a different chain of the same effect. This version adds:
He combined two persons from among the martyrs of Uhud in one garment.
حَدَّثَنَا سُلَيْمَانُ بْنُ دَاوُدَ الْمَهْرِيُّ، حَدَّثَنَا ابْنُ وَهْبٍ، عَنِ اللَّيْثِ، بِهَذَا الْحَدِيثِ بِمَعْنَاهُ قَالَ يَجْمَعُ بَيْنَ الرَّجُلَيْنِ مِنْ قَتْلَى أُحُدٍ فِي ثَوْبٍ وَاحِدٍ ‏.‏
Grade :  Sahih (Al-Albani) صحيح  (الألباني)حكم :
Reference : Sunan Abi Dawud 3139
In-book reference : Book 21, Hadith 51
English translation : Book 20, Hadith 3133