Genesis 15:17-18

When the sun had gone down and a [deep] darkness had come, there appeared a smoking brazier and a flaming torch which passed between the [divided] pieces [of the animals]. [Jer 34:18, 19] On the same day the LORD made a covenant (promise, pledge) with Abram, saying, “To your descendants I have given this land, From the river of Egypt to the great river Euphrates