Musannaf Ibn Abi Shaybah

Hazrat Riyah narrates that the Muslim Mujahideen found a grave in Madain, in which there was a man whose body was clothed in garments embroidered with gold threads and there was a great deal of wealth. The Mujahideen brought him to Hazrat Ammar bin Yasir. Hazrat Ammar wrote a letter to Hazrat Umar bin Khattab regarding this matter. Hazrat Umar ordered them to give all this wealth to the Mujahideen.