Genesis 13:14-16

14The Lord said to Abram, after Lot had left him, “Now lift up your eyes and look from the place where you are standing, northward and southward and eastward and westward;

15for all the land which you see I will give to you and to your descendants forever.

16I will make your descendants [as numerous] as the dust of the earth, so that if a man could count the [grains of] dust of the earth, then your descendants could also be counted.