Genesis 12:8

8From there he moved to the hill country on the east of aBethel and pitched his tent, with Bethel on the west and Ai on the east. And there he built an altar to the Lord and called upon the name of the Lord.

Genesis 18:1

1And the Lord appeared to him by the boaks
Or terebinths
of Mamre, as he sat at the door of his tent in the heat of the day.
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