Genesis 15:11

9He said to him, “Bring me a heifer three years old, a female goat three years old, a ram three years old, a turtledove, and a young pigeon.”

10He brought him all these, and divided them in the middle, and laid each half opposite the other; but he didn’t divide the birds.

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

12When the sun was going down, a deep sleep fell on Abram. Now terror and great darkness fell on him.

13He said to Abram, “Know for sure that your offspring will live as foreigners in a land that is not theirs, and will serve them. They will afflict them four hundred years.