Genesis 15:10-14

15:10 So Abram took all these for him and then cut them in two and placed each half opposite the other, but he did not cut the birds in half. 15:11 When birds of prey came down on the carcasses, Abram drove them away.

15:12 When the sun went down, Abram fell sound asleep, and great terror overwhelmed him. 15:13 Then the Lord said to Abram, “Know for certain that your descendants will be strangers in a foreign country. They will be enslaved and oppressed for four hundred years. 15:14 But I will execute judgment on the nation that they will serve. Afterward they will come out with many possessions.