Leviticus 27:1-8

GOD spoke to Moses: He said, “Speak to the People of Israel. Tell them, If anyone wants to vow the value of a person to the service of GOD, set the value of a man between the ages of twenty and sixty at fifty shekels of silver, according to the Sanctuary shekel. For a woman the valuation is thirty shekels. If the person is between the ages of five and twenty, set the value at twenty shekels for a male and ten shekels for a female. If the person is between one month and five years, set the value at five shekels of silver for a boy and three shekels of silver for a girl. If the person is over sixty, set the value at fifteen shekels for a man and ten shekels for a woman. If anyone is too poor to pay the stated amount, he is to present the person to the priest, who will then set the value for him according to what the person making the vow can afford.