Thematic Bible: Of the firstborn

And for the redemption of the two hundred and threescore and thirteen of the first-born of the children of Israel, that are over and above the number of the Levites, thou shalt take five shekels apiece by the poll; after the shekel of the sanctuary shalt thou take them (the shekel is twenty gerahs): and thou shalt give the money, wherewith the odd number of them is redeemed, unto Aaron and to his sons. read more.
And Moses took the redemption-money from them that were over and above them that were redeemed by the Levites; from the first-born of the children of Israel took he the money, a thousand three hundred and threescore and five'shekels , after the shekel of the sanctuary: and Moses gave the redemption-money unto Aaron and to his sons, according to the word of Jehovah, as Jehovah commanded Moses.

Everything that openeth the womb, of all flesh which they offer unto Jehovah, both of man and beast shall be thine: nevertheless the first-born of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem. And those that are to be redeemed of them from a month old shalt thou redeem, according to thine estimation, for the money of five shekels, after the shekel of the sanctuary (the same is twenty gerahs).