Genesis 12:7-9

The LORD appeared to Abram and said, “I will give this land to your descendants.” So Abram built an altar there to the LORD, who had appeared to him. Then he traveled from Shechem to the mountain east of Bethel and set up his tent there. Bethel was to the west, and Ai was to the east. There Abram built another altar to the LORD and worshiped him. After this, he traveled on toward southern Canaan.