Numbers 18:16-18

Amplified Bible

¹⁶ And their redemption price, from a month old you shall redeem, according to your ^[a]valuation, for the [fixed] price of five shekels in silver, in accordance with the shekel of the sanctuary, which is twenty gerahs. ¹⁷ But the firstborn of a cow or of a sheep or of a goat you shall not redeem; they are holy [and belong to the Lord]. You shall sprinkle their blood on the altar and shall offer up their fat in smoke as an offering by fire, for a sweet and soothing aroma to the Lord. ¹⁸ Their meat shall be yours, like the breast of a wave offering and like the right thigh.