Genesis 15:14 YLT

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,

¹⁴  and the nation also whom they serve I judge, and after this they go out with great substance;

¹⁵  and thou -- thou comest in unto thy fathers in peace; thou art buried in a good old age;

¹⁶  and the fourth generation doth turn back hither, for the iniquity of the Amorite is not yet complete.'