TSK
Treasury of Scripture Knowledge references in NET.
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,
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.
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.