Genesis 15:12-16

When the sun was setting, a deep sleep overcame Abram; and a horror (terror, shuddering fear, nightmare) of great darkness overcame him. God said to Abram, “Know for sure that your descendants will be strangers [living temporarily] in a land (Egypt) that is not theirs, where they will be enslaved and oppressed for four hundred years. [Ex 12:40] But on that nation whom your descendants will serve I will bring judgment, and afterward they will come out [of that land] with great possessions. [Ex 12:35, 36; Acts 7:6, 7] As for you, you shall [die and] go to your fathers in peace; you shall be buried at a good old age. 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]