Genesis 13:15

for all the land which thou seest, to thee will I give it and to thy seed forever. The separation of Lot from Abram was, in a way, prophetical of the relation which would afterwards obtain between his descendants and those of Abram. And just at this time the Lord repeated His promise to Abram, bidding him look from the place where he then was, almost in the center of Canaan, in every direction, since this entire country was to be the possession of his descendants. Thus Abram, in spirit at least, if not in fact, was to claim the land of Canaan for his posterity.