Thematic Bible: By offering a sacrifice

And he said unto him, "Take a heifer of three years old, and a she-goat of three years old, and a three year old ram, a turtle dove and a young pigeon." And he took all these and divided them in the midst, and laid every piece, one over against another. But the fowls divided he not. And the birds fell on the carcasses, but Abram drove them away. read more.
And when the sun was down, there fell a slumber upon Abram. And lo, fear and great darkness came upon him. And he said unto Abram, "Know this of a surety, that thy seed shall be a stranger in a land that pertaineth not unto them. And they shall make bondmen of them and entreat them evil, four hundred years. But the nation whom they shall serve, will I judge. And afterward shall they come out with great substance. Nevertheless, thou shalt go unto thy fathers in peace, and shalt be buried when thou art of a good age: and in the fourth generation they shall come hither again, for the wickedness of the Amorites is not yet full." When the sun was down and it was waxed dark, behold, there was a smoking furnace and a fire brand that went between the said pieces.

Yea, those men that have broken my covenant, and not kept the words of the covenant which they made before me - when they hewed the calf in two, and when there went through the two halves thereof - The princes of Judah, the princes of Jerusalem, the gelded men, the Priests and all the people of the land, which went through the two sides of the calf.