Genesis 15:11-13

Young's Literal Translation

¹¹ and the ravenous birds come down upon the carcases, and Abram causeth them to turn back.

¹² And the sun is about to go in, and deep sleep hath fallen upon Abram, and lo, a terror of great darkness is falling upon him;

¹³ and He saith to Abram, `knowing -- know that thy seed is a sojourner in a land not theirs, and they have served them, and they have afflicted them four hundred years,