Leviticus 27:10

27:10 He must not replace or exchange it, good for bad or bad for good, and if he does indeed exchange one animal for another animal, then both the original animal and its substitute will be holy.

Leviticus 27:15

27:15 If the one who consecrates it redeems his house, he must add to it one fifth of its conversion value in silver, and it will belong to him.

Leviticus 27:19

27:19 If, however, the one who consecrated the field redeems it, he must add to it one fifth of the conversion price and it will belong to him.

Leviticus 5:16

5:16 And whatever holy thing he violated he must restore and must add one fifth to it and give it to the priest. So the priest will make atonement on his behalf with the guilt offering ram and he will be forgiven.”

Leviticus 6:4-5

6:4 when it happens that he sins and he is found guilty, then he must return whatever he had stolen, or whatever he had extorted, or the thing that he had held in trust, or the lost thing that he had found, 6:5 or anything about which he swears falsely. He must restore it in full and add one fifth to it; he must give it to its owner when he is found guilty.

Leviticus 22:14

22:14 “‘If a man eats a holy offering by mistake, he must add one fifth to it and give the holy offering to the priest.