Genesis 15:15 YLT

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.'

¹⁷  And it cometh to pass -- the sun hath gone in, and thick darkness hath been -- and lo, a furnace of smoke, and a lamp of fire, which hath passed over between those pieces.