Genesis 15:10 WBT

⁸  And he said, Lord GOD, by what shall I know that I shall inherit it?

⁹  And he said to him, Take me a heifer of three years old, and a she-goat of three years old, and a ram of three years old, and a turtle-dove, and a young pigeon.

¹⁰  And he took to him all these, and divided them in the midst, and laid each piece one against another: but the birds he did not divide.

¹¹  And when the fowls came down upon the carcases, Abram drove them away.

¹²  And when the sun was going down, a deep sleep fell upon Abram; and lo, a horror of great darkness fell upon him.