Genesis 12:7-8

Then the LORD appeared to Abram and said, “I will give this land to your descendants.” So Abram built an altar there to [honor] the LORD who had appeared to him. Then he moved on from there to the mountain on the east of Bethel, 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 on the name of the LORD [in worship through prayer, praise, and thanksgiving].