Numbers 18:15-17 Every thing that opens the matrix in all flesh, which they bring to the LORD, whether it be of men or beasts, shall be yours: nevertheless the firstborn of man shall you surely redeem, and the firstling of unclean beasts shall you redeem.

AKJV_Strongs⁽ⁱ⁾

15 H3605 Every H6363 thing that opens H7358 the matrix H3605 in all H1320 flesh, H834 which H7126 they bring H3068 to the LORD, H120 whether it be of men H176 or H929 beasts, H389 shall be yours: nevertheless H1060 the firstborn H120 of man H6299 shall you surely redeem, H1060 and the firstling H2931 of unclean H929 beasts H6299 shall you redeem.

16 H6299 And those that are to be redeemed H2320 from a month H1121 old H6299 shall you redeem, H6187 according to your estimation, H3701 for the money H2568 of five H8255 shekels, H8255 after the shekel H6944 of the sanctuary, H1958 which H6242 is twenty H1626 gerahs.

17 H1060 But the firstling H7794 of a cow, H1060 or the firstling H3775 of a sheep, H176 or H1060 the firstling H5795 of a goat, H6299 you shall not redeem; H6944 they are holy: H2236 you shall sprinkle H1818 their blood H4196 on the altar, H6999 and shall burn H2459 their fat H5207 for an offering made by fire, for a sweet H7381 smell H3068 to the LORD.