Leviticus 17:5-6

The purpose of this rule is to stop the Israelites from sacrificing animals in the open fields. It will ensure that they bring their sacrifices to the priest at the entrance of the Tabernacle, so he can present them to the LORD as peace offerings. Then the priest will be able to splatter the blood against the LORD’s altar at the entrance of the Tabernacle, and he will burn the fat as a pleasing aroma to the LORD.