Leviticus 7:8

The priest shall have to himself the skin. — As the skin was the only part not consumed by the fire, in the case of the burnt offering, it fell to the share of the officiating priest. According to the rule which obtained during the second Temple, all the skins of the most holy things belonged to the officiating priests — i.e., those of the trespass offering, the sin offerings of the laity, &c. — whereas those of the holy things — i.e., those of the peace offerings — belonged to the owners of the victims. These skins, which accumulated during the week, the priests whose course it was to serve divided between them every Sabbath evening.