Leviticus 27:33-34

Tree of Life Version

³³ One is not to inquire if it is good or bad, nor exchange it. Or if he does exchange it, then both it and that for which it is exchanged will become holy, and may not be redeemed.”

³⁴ These are the mitzvot which Adonai commanded Moses for Bnei-Yisrael on Mount Sinai.