Numbers 18:12-24
12 “I give you all the finest olive oil and all the finest new wine and grain they give the Lord as the firstfruits of their harvest.
13 All the land’s firstfruits that they bring to the Lord will be yours. Everyone in your household who is ceremonially clean may eat it.
14 “Everything in Israel that is devoted to the Lord is yours.
15 The first offspring of every womb, both man and animal, that is offered to the Lord is yours. But you must redeem every firstborn son and every firstborn male of unclean animals.
16 When they are a month old, you must redeem them at the redemption price set at five shekels of silver, according to the sanctuary shekel, which weighs twenty gerahs.
17 “But you must not redeem the firstborn of an ox, a sheep or a goat; they are holy. Sprinkle their blood on the altar and burn their fat as an offering made by fire, an aroma pleasing to the Lord.
18 Their meat is to be yours, just as the breast of the wave offering and the right thigh are yours.
19 Whatever is set aside from the holy offerings the Israelites present to the Lord I give to you and your sons and daughters as your regular share. It is an everlasting covenant of salt before the Lord for both you and your offspring.”
20 The Lord said to Aaron, “You will have no inheritance in their land, nor will you have any share among them; I am your share and your inheritance among the Israelites.
21 “I give to the Levites all the tithes in Israel as their inheritance in return for the work they do while serving at the Tent of Meeting.
22 From now on the Israelites must not go near the Tent of Meeting, or they will bear the consequences of their sin and will die.
23 It is the Levites who are to do the work at the Tent of Meeting and bear the responsibility for offenses against it. This is a lasting ordinance for the generations to come. They will receive no inheritance among the Israelites.
24 Instead, I give to the Levites as their inheritance the tithes that the Israelites present as an offering to the Lord. That is why I said concerning them: ‘They will have no inheritance among the Israelites.’”