Leviticus 17:2-6

2“Speak to Aaron and his sons and all the children of Israel, and say to them, ‘This is what the Lord has commanded, saying,

3“Any man from the house of Israel who kills an ox or lamb or goat in the camp, or kills it outside the camp

4and has not brought it to the doorway of the Tent of Meeting to offer it as an offering to the Lord before the tabernacle of the Lord, that man shall be guilty of bloodshed. He has shed blood and shall be cut off from his people [excluding him from the atonement made for them].

5This is so that the sons of Israel may bring their sacrifices which they were sacrificing [to idols] in the open field [where they killed them], that they may bring them in to the Lord, at the doorway of the Tent of Meeting to the priest, and sacrifice them as sacrifices of peace offerings to the Lord.

6The priest shall sprinkle the blood on the altar of the Lord at the doorway of the Tent of Meeting and offer the fat up in smoke as a sweet and soothing aroma to the Lord.