It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "By the One in whose Hand is my soul, no one is wounded in the way of Allah, and Allah knows best who is wounded in His way, except that he will come on the Day of Resurrection with his wound flowing with blood; its blood will be the colour of blood, but its fragrance will be the fragrance of musk."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6802