Caul

The caul in the Mosaic sacrificial system referred to the fatty membrane encasing the liver — specifically the lobe or appendage above the liver — which was required to be burned on the altar as part of various animal offerings, including the peace offering, burnt offering, and sin offering (Exodus 29:13, 22; Leviticus 3:4, 10, 15; 4:9; 7:4). The burning of fat portions was considered especially pleasing to God and was reserved exclusively for him; the Israelites were forbidden to eat the fat of sacrificial animals (Leviticus 3:17). The caul thus represented the consecrated portions of the sacrifice returned entirely to God, signifying complete devotion in worship.