Leviticus 27:2-7

2“Speak to the people of Israel and say to them, If anyone makes a special vow to the LORD involving the valuation of persons, 3then the valuation of a male from twenty years old up to sixty years old shall be fifty shekels of silver, according to the shekel of the sanctuary. 4If the person is a female, the valuation shall be thirty shekels. 5If the person is from five years old up to twenty years old, the valuation shall be for a male twenty shekels, and for a female ten shekels. 6If the person is from a month old up to five years old, the valuation shall be for a male five shekels of silver, and for a female the valuation shall be three shekels of silver. 7And if the person is sixty years old or over, then the valuation for a male shall be fifteen shekels, and for a female ten shekels.