Genesis 15:11-13 New King James Version (NKJV)
11 And when the vultures came down on the carcasses, Abram drove them away.
12 Now when the sun was going down, a deep sleep fell upon Abram; and behold, horror and great darkness fell upon him. 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.
Genesis 15:11-13 New International Version (NIV)
11 Then birds of prey came down on the carcasses, but Abram drove them away.
12 As the sun was setting, Abram fell into a deep sleep, and a thick and dreadful darkness came over him. 13 Then the Lord said to him, “Know for certain that for four hundred years your descendants will be strangers in a country not their own and that they will be enslaved and mistreated there.