Leviticus 27:2-8

ISV(i) 2 “Tell the Israelis that when a person makes a special vow based on the appropriate value of people who belong to the LORD, 3 if your valuation of the vow is for a male from 20 to 60 years old, the valuation is to be 50 shekels of silver, according to the shekel of the sanctuary. 4 If she is a female from 20 to 60 years old, then your valuation is to be 30 shekels, according to the shekel of the sanctuary. 5 If a person is from five to 20 years, then your valuation for a male is to be 20 shekels and for a female ten shekels. 6 If a person is from one month to five years old, then your valuation for a male is to be five shekels of silver, and for a female your valuation is to be three shekels of silver. 7 If a person is 60 or more years old, then your valuation for a male is to be fifteen shekels and for a female ten shekels. 8 But if he is too poor to be valuated, then cause him to stand before the priest and let the priest set a value on him according to the ability of the one making the vow.