Sa'id bin Jubayr narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) gave an order concerning the martyrs of Uhud: "Let the iron and leather be removed from them, and let them be buried in their clothes and their blood."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6812