Thematic Bible: Of the firstborn

For the redemption of the two hundred seventy-three of the firstborn of the children of Israel, who exceed the number of the Levites, you shall take five shekels apiece for each one; after the shekel of the sanctuary you shall take them (the shekel is twenty gerahs): and you shall give the money, with which the remainder of them is redeemed, to Aaron and to his sons." read more.
Moses took the redemption money from those who exceeded the number of those who were redeemed by the Levites; from the firstborn of the children of Israel he took the money, one thousand three hundred sixty-five shekels, after the shekel of the sanctuary: and Moses gave the redemption money to Aaron and to his sons, according to the word of Yahweh, as Yahweh commanded Moses.

Everything that opens the womb, of all flesh which they offer to Yahweh, both of man and animal shall be yours: nevertheless you shall surely redeem the firstborn of man, and you shall redeem the firstborn of unclean animals. You shall redeem those who are to be redeemed of them from a month old, according to your estimation, for five shekels of money, after the shekel of the sanctuary (the same is twenty gerahs).