Genesis 15:9-13

9The Lord said to him, “Take for me a heifer, a goat, and a ram, each three years old, along with a dove and a young pigeon.”

10So 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.

11When birds of prey came down on the carcasses, Abram drove them away.

12When the sun went down, Abram fell sound asleep, and great terror overwhelmed him.

13Then 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.