Numbers 18:17-19

Living Bible

¹⁷ “However, the firstborn of cows, sheep, or goats may not be bought back; they must be sacrificed to the Lord.^[a] Their blood is to be sprinkled upon the altar, and their fat shall be burned as a fire offering; it is very pleasant to the Lord. ¹⁸ The meat of these animals shall be yours, including the breast and right thigh that are presented to the Lord by the gesture of waving before the altar. ¹⁹ Yes, I have given to you all of these ‘wave offerings’ brought by the people of Israel to the Lord; they are for you and your families as food; this is a permanent contract^[b] between the Lord and you and your descendants.