Genesis 15:13-21 NRS

13 Then the Lord a said to Abram, "Know this for certain, that your offspring shall be aliens in a land that is not theirs, and shall be slaves there, and they shall be oppressed for four hundred years;

References for Genesis 15:13

      14 but I will bring judgment on the nation that they serve, and afterward they shall come out with great possessions.
      15 As for yourself, you shall go to your ancestors in peace; you shall be buried in a good old age.
      16 And they shall come back here in the fourth generation; for the iniquity of the Amorites is not yet complete."
      17 When the sun had gone down and it was dark, a smoking fire pot and a flaming torch passed between these pieces.
      18 On that day the Lord made a covenant with Abram, saying, "To your descendants I give this land, from the river of Egypt to the great river, the river Euphrates,
      19 the land of the Kenites, the Kenizzites, the Kadmonites,
      20 the Hittites, the Perizzites, the Rephaim,
      21 the Amorites, the Canaanites, the Girgashites, and the Jebusites."