Genesis 12:7-9

Then the LORD appeared to Abram and said, “I will give this land to your descendants.” And Abram built an altar there and dedicated it to the LORD, who had appeared to him. After that, Abram traveled south and set up camp in the hill country, with Bethel to the west and Ai to the east. There he built another altar and dedicated it to the LORD, and he worshiped the LORD. Then Abram continued traveling south by stages toward the Negev.