Genesis 15:10-12

Revised Standard Version

¹⁰ And he brought him all these, cut them in two, and laid each half over against the other; but he did not cut the birds in two. ¹¹ And when birds of prey came down upon the carcasses, Abram drove them away.

¹² As the sun was going down, a deep sleep fell on Abram; and lo, a dread and great darkness fell upon him.