Leviticus 27:33
33 One shall not differentiate between good or bad, neither shall he make a nsubstitute for it; and if he does substitute for it, then both it and the substitute shall be holy; it shall not be redeemed.”
Ezekiel 48:14
14 They shall not sell or exchange any of it. They shall not alienate this choice portion of the land, for it is holy to the Lord.