It is narrated from Anas bin Malik (may Allah be pleased with him) that al-Bara' bin Malik (may Allah be pleased with him) fought the marzuban in single combat. He charged at him with his spear, drove it into his back, and took his two bracelets and his belt. That day Umar (may Allah be pleased with him) led the prayer, then said: Is Abu Talhah (may Allah be pleased with him) here? We have been giving a man of the Muslims the salab of a man of the disbelievers, because the Muslim killed him, but the salab of al-Bara' has reached (the level of substantial) wealth, and I intend to take the khumus from it. Muhammad (bin Sirin, may Allah have mercy on him) was asked: Was the khumus taken from it? He said: I do not know.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12787