Muwatta Imam Malik (Riwayat Ibn al-Qasim)

And with the same chain of narration, it is narrated from (Sayyiduna Abu Hurairah, may Allah be pleased with him) that the Messenger of Allah, peace and blessings be upon him, said: "By Him in Whose hand is my soul! Whoever among you is wounded in the way of Allah—and Allah knows who is wounded in His way—then this person will come on the Day of Resurrection with his wound bleeding. Its color will be like blood and its fragrance will be like musk."