Ezekiel 48:12 identifies the priest's portion as holy of the land—the very portion that must not be sold or exchanged.

Leviticus 27:28 establishes that devoted things are most holy and cannot be sold—this principle directly undergirds the inviolability of the priestly portion here.

Leviticus 25:23 states land belongs to God and cannot be sold permanently—directly explains why this priestly land is inalienable.