King James Version
And when the sun was going down, a deep sleep fell upon Abram; and, lo, an horror of great darkness fell upon him.English Standard Version
As the sun was going down, a deep sleep fell on Abram. And behold, dreadful and great darkness fell upon him.New International Version
As the sun was setting, Abram fell into a deep sleep, and a thick and dreadful darkness came over him.