And I will make your descendants as the dust of the earth; so that if a man could number the dust of the earth, then your descendants also could be numbered.
Genesis 13:16
Surrounding context
13:15 for all the land which you see I give to you and your descendants forever.
13:16 And I will make your descendants as the dust of the earth; so that if a man could number the dust of the earth, then your descendants also could be numbered.
13:17 Arise, walk in the land through its length and its width, for I give it to you."