The tree-grove near Hebron where Abram pitches his tent and builds an altar (13:18) — the third named tree at one of his altars, after Shechem's tree of Moreh (12:6). Mamre is also a person, an Amorite ally of Abram's named in the very next chapter (14:13, 24) — the place and the man are not shown to be connected beyond sharing the name, the same double-use already flagged at Haran. Here, in the heat of the day, the three visitors arrive and Isaac is promised within the year (18:1-15).