Leviticus 17:3-5
3 Any Israelite who sacrifices an ox, a lamb or a goat in the camp or outside of it
4 instead of bringing it to the entrance to the Tent of Meeting to present it as an offering to the Lord in front of the tabernacle of the Lord—that man shall be considered guilty of bloodshed; he has shed blood and must be cut off from his people.
5 This is so the Israelites will bring to the Lord the sacrifices they are now making in the open fields. They must bring them to the priest, that is, to the Lord, at the entrance to the Tent of Meeting and sacrifice them as fellowship offerings.