Leviticus 27:1-6

The LORD spoke to Moses, saying, “Speak to the people of Israel and say to them, If anyone makes a special vow to the LORD involving the valuation of persons, then 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. If the person is a female, the valuation shall be thirty shekels. If 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. If 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.