Genesis 13:14-17

14 The Lord said to Abram, after Lot had separated from him, "Raise your eyes now, and look from the place where you are, northward and southward and eastward and westward;
15 for all the land that you see I will give to you and to your offspring forever.
16 I will make your offspring like the dust of the earth; so that if one can count the dust of the earth, your offspring also can be counted.
17 Rise up, walk through the length and the breadth of the land, for I will give it to you."