Now when the sun was going down, a deep sleep fell upon Abram; and behold, horror and great darkness fell upon him.
Genesis 15:12
Surrounding context
15:11 And when the vultures came down on the carcasses, Abram drove them away.
15:12 Now when the sun was going down, a deep sleep fell upon Abram; and behold, horror and great darkness fell upon him.
15:13 Then He said to Abram: "Know certainly that your descendants will be strangers in a land that is not theirs, and will serve them, and they will afflict them four hundred years.