Genesis 15:15-21

You, however, will go to your ancestors in peace and live a full life. And after the fourth generation, your descendants will return here; for then the sin of the Amorites will be ripe for judgment.” When the sun had set, and it was very dark, there suddenly appeared a smoking firepot and a blazing torch that passed between the split carcasses. On that day, YAHWEH entered into covenant with Abram: “I have given this land to your descendants, from the Egyptian border to the great river Euphrates, the entire land of the Kenites, the Kenizzites, the Kadmonites, the Hittites, the Perizzites, the Rephaites, the Amorites, the Canaanites, the Girgashites, and the Jebusites.”