Leviticus 27:1-8

Now the LORD spoke to Moses, saying, “Speak to the children of Israel, and say to them: ‘When a man consecrates by a vow certain persons to the LORD, according to your valuation, if your valuation is of a male from twenty years old up to sixty years old, then your valuation shall be fifty shekels of silver, according to the shekel of the sanctuary. If it is a female, then your valuation shall be thirty shekels; and if from five years old up to twenty years old, then your valuation for a male shall be twenty shekels, and for a female ten shekels; and if from a month old up to five years old, then your valuation for a male shall be five shekels of silver, and for a female your valuation shall be three shekels of silver; and if from sixty years old and above, if it is a male, then your valuation shall be fifteen shekels, and for a female ten shekels. ‘But if he is too poor to pay your valuation, then he shall present himself before the priest, and the priest shall set a value for him; according to the ability of him who vowed, the priest shall value him.