Numbers 18:20

16 You are to pay the redemption price for a month-old male according to your valuation: five shekels of silver, according to the sanctuary shekel, which is twenty gerahs.

17 But you must not redeem the firstborn of an ox, a sheep, or a goat; they are holy. You are to sprinkle their blood on the altar and burn their fat as an offering made by fire, a pleasing aroma to the LORD.

18 And their meat belongs to you, just as the breast and right thigh of the wave offering belong to you.

19 All the holy offerings that the Israelites present to the LORD I give to you and to your sons and daughters as a permanent statute. It is a permanent covenant of salt before the LORD for you and your offspring.”

20 Then the LORD said to Aaron, “You will have no inheritance in their land, nor will you have any portion among them. I am your portion and your inheritance among the Israelites.

21 Behold, I have given to the Levites all the tithes in Israel as an inheritance in return for the work they do, the service of the Tent of Meeting.

22 No longer may the Israelites come near to the Tent of Meeting, or they will incur guilt and die.

23 The Levites are to perform the work of the Tent of Meeting, and they must bear their iniquity. This is a permanent statute for the generations to come. The Levites will not receive an inheritance among the Israelites.

24 For I have given to the Levites as their inheritance the tithe that the Israelites present to the LORD as a contribution. That is why I told them that they would not receive an inheritance among the Israelites.”

Read all of Numbers 18