Genesis 15:13 KJV
And he said unto Abram, Know of a surety that thy seed shall be a stranger in a land that is not theirs, and shall serve them; and they shall afflict them four hundred years;
Genesis 15:11–15 KJV Chapter Context
11
And when the fowls came down upon the carcases, Abram drove them away.
12
And when the sun was going down, a deep sleep fell upon Abram; and, lo, an horror of great darkness fell upon him.
13
And he said unto Abram, Know of a surety that thy seed shall be a stranger in a land that is not theirs, and shall serve them; and they shall afflict them four hundred years;
14
And also that nation, whom they shall serve, will I judge: and afterward shall they come out with great substance.
15
And thou shalt go to thy fathers in peace; thou shalt be buried in a good old age.