18Then Abram removed his tent, and came and dwelt in the plain of Mamre, which is in Hebron, and built there an altar unto YHVH.
GENESIS 14:13 (KJV)
13And there came one that had escaped, and told Abram the Hebrew; for he dwelt in the plain of Mamre the Amori, brother of Eshcol, and brother of Aner: and these were confederate with Abram.
GENESIS 18:1 (KJV)
1And YHVH appeared unto [Abraham] in the plains of Mamre: and he sat in the tent door in the heat of the day;