Leviticus 27:2-8

2“Speak to the Israelites and say to them, ‘When someone makes a special vow to the LORD involving the value of persons, 3if the valuation concerns a male from twenty to sixty years of age, then your valuation shall be fifty shekels of silver,1 according to the sanctuary shekel.2 4Or if it is a female, then your valuation shall be thirty shekels.3 5And if the person is from five to twenty years of age, then your valuation for the male shall be twenty shekels,4 and for the female ten shekels.5

6Now if the person is from one month to five years of age, then your valuation for the male shall be five shekels of silver,6 and for the female three shekels of silver.7 7And if the person is sixty years of age or older, then your valuation shall be fifteen shekels8 for the male and ten shekels for the female. 8But if the one making the vow is too poor to pay the valuation, he is to present the person9 before the priest, who shall set the value according to what the one making the vow can afford.