Genesis 12
7 Ref Yahweh appeared to Abram, and said, "I will give this land to your seed{or, offspring}." He built an altar there to Yahweh, who appeared to him.
8 Ref He left from there to the mountain on the east of Bethel, and pitched his tent, having Bethel on the west, and Ai on the east. There he built an altar to Yahweh, and called on the name of Yahweh.