וַיֶּאֱהַ֣ל אַבְרָ֗ם וַיָּבֹ֛א וַיֵּ֛שֶׁב בְּאֵלֹנֵ֥י מַמְרֵ֖א אֲשֶׁ֣ר בְּחֶבְר֑וֹן וַיִּֽבֶן־שָׁ֥ם מִזְבֵּ֖חַ לַֽיהוָֽה׃ (פ)
Abram alla dresser sa tente et établir sa demeure dans les plaines de Mamré, qui sont en Hébron; et il y éleva un autel au Seigneur.
Sforno on Genesis
ויאהל אברם, an expression denoting the encamping, erecting one’s many tents.
Radak on Genesis
ויאהל אברם, he moved his tent from there and pitched it from one place to another until he arrived at Eloney Mamre. This is not the same אלון מורה mentioned in 12,6. The previous place was located in the plain, and the owner of that site was called Moreh. Here we speak of at least two plains belonging to a person called Mamre, the brother of Eshkol and the brother of Aner.