Genesis 13:14-16

14And Jehovah said to Abram, after that Lot had separated himself from him, Lift up now thine eyes, and look from the place where thou art, northward and southward and eastward and westward;

15for all the land that thou seest will I give to thee, and to thy seed for ever.

16And I will make thy seed as the dust of the earth, so that if any one can number the dust of the earth, thy seed also will be numbered.