Genesis 13:14-18

The LORD said to Abram after Lot had parted from him, “Look around from where you are, to the north and south, to the east and west. All the land that you see I will give to you and your offspring forever. I will make your offspring like the dust of the earth, so that if anyone could count the dust, then your offspring could be counted. Go, walk through the length and breadth of the land, for I am giving it to you.” So Abram went to live near the great trees of Mamre at Hebron, where he pitched his tents. There he built an altar to the LORD.