Leviticus 17:5-6

This rule is so people will bring their sacrifices, which they have been sacrificing in the open fields, to the LORD. They must bring those animals to the LORD at the entrance of the Meeting Tent; they must bring them to the priest and offer them as fellowship offerings. Then the priest will sprinkle the blood from those animals on the LORD’s altar near the entrance of the Meeting Tent. And he will burn the fat from those animals on the altar, as a smell pleasing to the LORD.