Cross reference
Numbers 18:16
16 Those who are to be redeemed of them from a month old shall you redeem, according to your estimation, for the money of five shekels, after the shekel of the sanctuary (the same is twenty gerahs).
Exodus 30:13
13 They shall give this, everyone who passes over to those who are numbered, half a shekel after the shekel of the sanctuary; (the shekel is twenty gerahs;) half a shekel for an offering to Yahweh.
Numbers 3:47
47 you shall take five shekels apiece for each one; after the shekel of the sanctuary you shall take them (the shekel is twenty gerahs):
Leviticus 27:2-7
2 "Speak to the children of Israel, and say to them, 'When a man makes a vow, the persons shall be for Yahweh by your valuation.
3 Your valuation shall be of a male from twenty years old even to sixty years old, even your valuation shall be fifty shekels of silver, after the shekel of the sanctuary.
4 If it is a female, then your valuation shall be thirty shekels.
5 If the person is from five years old even to twenty years old, then your valuation shall be for a male twenty shekels, and for a female ten shekels.
6 If the person is from a month old even to five years old, then your valuation shall be for a male five shekels of silver, and for a female your valuation shall be three shekels of silver.
7 If the person is from sixty years old and upward; if it is a male, then your valuation shall be fifteen shekels, and for a female ten shekels.
Leviticus 27:25
25 All your valuations shall be according to the shekel of the sanctuary: twenty gerahs to the shekel.
Ezekiel 45:12
12 The shekel shall be twenty gerahs. Twenty shekels plus twenty-five shekels plus fifteen shekels shall be your mina.