Leviticus 27:19-27

19And if the one who consecrated the field decides to redeem it, he must add a fifth to the assessed value, and it shall belong to him.

20If, however, he does not redeem the field, or if he has sold it to another man, it may no longer be redeemed. 21When the field is released in the Jubilee, it will become holy, like a field devoted to the LORD; it becomes the property of the priests.

22Now if a man consecrates to the LORD a field he has purchased, which is not a part of his own property, 23then the priest shall calculate for him the value up to the Year of Jubilee, and the man shall pay the assessed value on that day as a sacred offering to the LORD. 24In the Year of Jubilee the field shall return to the one from whom it was bought—the original owner of the land. 25Every valuation will be according to the sanctuary shekel, twenty gerahs to the shekel.1

26But no one may consecrate a firstborn of the livestock, because a firstborn belongs to the LORD. Whether it is an ox or a sheep, it is the LORD’s. 27But if it is among the unclean animals, then he may redeem it according to your valuation and add a fifth of its value. If it is not redeemed, then it shall be sold according to your valuation.