Genesis 15:6-16

And he believed! Believed GOD! God declared him “Set-Right-with-God.” GOD continued, “I’m the same GOD who brought you from Ur of the Chaldees and gave you this land to own.” Abram said, “Master GOD, how am I to know this, that it will all be mine?” GOD said, “Bring me a heifer, a goat, and a ram, each three years old, and a dove and a young pigeon.” He brought all these animals to him, split them down the middle, and laid the halves opposite each other. But he didn’t split the birds. Vultures swooped down on the carcasses, but Abram scared them off. As the sun went down a deep sleep overcame Abram and then a sense of dread, dark and heavy. GOD said to Abram, “Know this: your descendants will live as outsiders in a land not theirs; they’ll be enslaved and beaten down for 400 years. Then I’ll punish their slave masters; your offspring will march out of there loaded with plunder. But not you; you’ll have a long and full life and die a good and peaceful death. Not until the fourth generation will your descendants return here; sin is still a thriving business among the Amorites.”