Parashas Chayei Sarah · Passuk 23:18
to Avraham as a possession before the eyes of the children of Cheis, of all who entered the gate of his city.
Rashi on Bereishis 23:17 / Bereshit Rabbah 58:8 (classical source on this passuk; not listed as a numbered Torah Temimah unit here).
Lemma / focus: ויקם שדה עפרון.
English: It received a rise in importance, for it passed from the possession of a commoner into the possession of a king; and the plain sense is that the field and the cave and all the trees were established to Avraham as a purchase.
Derash on the verse (Rashi / midrash) — not a formal named middah of the 13: the root of “rising” is read both as legal establishment and as elevation of status.
The field of Ephron rose in status when it passed into Avraham’s possession; what had been a commoner’s field became the holding of a king, established before all who entered the gate.