Leviticus 27:1-8

Again, the LORD spoke to Moses, saying, “Speak to the sons of Israel and say to them, ‘When someone makes an explicit vow, he shall be valued according to your assessment of persons belonging to the LORD. If your assessment is of a male from twenty years even to sixty years old, then your assessment shall be fifty shekels of silver, by the shekel of the sanctuary. Or if the person is a female, then your assessment shall be thirty shekels. And if the person is from five years even to twenty years old, then your assessment for a male shall be twenty shekels, and for a female, ten shekels. But if the person is from a month even up to five years old, then your assessment shall be five shekels of silver for a male, and for a female your assessment shall be three shekels of silver. If the person is from sixty years old and upward, if a male, then your assessment shall be fifteen shekels, and for a female, ten shekels. But if he is poorer than your assessment, then he shall be presented before the priest, and the priest shall assess him; according to the means of the one who vowed, the priest shall assess him.