Genesis 15:9-13

9The Lord told him, “Bring me a three-year-old heifer, a three-year-old female goat, a three-year-old ram, a turtledove, and a young pigeon.”

10So Abram presented all these to him and killed them. Then he cut each animal down the middle and laid the halves side by side; he did not, however, cut the birds in half.

11Some vultures swooped down to eat the carcasses, but Abram chased them away.

12As the sun was going down, Abram fell into a deep sleep, and a terrifying darkness came down over him.

13Then the Lord said to Abram, “You can be sure that your descendants will be strangers in a foreign land, where they will be oppressed as slaves for 400 years.