Genesis 15:13

10 And he took him all these, and divided them in the midst, and laid each half over against the other: but the birds divided he not.

11 And the birds of prey came down upon the carcasses, and Abram drove them away.

12 And when the sun was going down, a deep sleep fell upon Abram; and, lo, a horror of great darkness fell upon him.

13 And he said unto Abram, Know of a surety that thy seed shall be sojourners in a land that is not theirs, and shall serve them; and they shall afflict them four hundred years;

14 and also that nation, whom they shall serve, will I judge: and afterward shall they come out with great substance.

15 But thou shalt go to thy fathers in peace; thou shalt be buried in a good old age.

16 And in the fourth generation they shall come hither again; for the iniquity of the Amorite is not yet full.