Leviticus 27:25-27

The Voice

²⁵ All of your assessments should be based on the sanctuary’s weights: the basic unit is ⅖ of an ounce.

²⁶ Firstborn animals already belong to Me, so no one is allowed to dedicate any firstborn animal—be it an ox or a sheep. It is already Mine. ²⁷ If it is an impure animal—unsuitable as a sacrifice—then the person making the vow may redeem it for its value plus ⅕. If the owner decides not to redeem it, then it must be sold for its proper value and the sanctuary will keep the proceeds.