Numbers 18:14-16

Young's Literal Translation

¹⁴ every devoted thing in Israel is thine,

¹⁵ every one opening a womb of all flesh which they bring near to Jehovah, among man and among beast, is thine; only, thou dost certainly ransom the first-born of man, and the firstling of the unclean beast thou dost ransom.

¹⁶ `And their ransomed ones from a son of a month, thou dost ransom with thy valuation, of silver, five shekels, by the shekel of the sanctuary, twenty gerahs it [is].