Genesis 15:16, 18

Then in the fourth generation your descendants shall return here [to Canaan, the land of promise], for the wickedness and guilt of the Amorites is not yet complete (finished).” [Josh 24:15]

On the same day the LORD made a covenant (promise, pledge) with Abram, saying, “To your descendants I have given this land, From the river of Egypt to the great river Euphrates