Musannaf Ibn Abi Shaybah 35306 — Those who gave the belongings

Ibn Jurayj (may Allah have mercy on him) reports: I heard Nafi' (may Allah have mercy on him) say: We have always heard since childhood that when the Muslims and the disbelievers meet, and a man of the Muslims kills a man of the disbelievers, the belongings of that slain man shall belong to the one who killed him, unless it is in the thick of the fighting, for then it is not known who killed whom.