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.

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.