Original Verse:
Acts Chapter 7 Verse 6God spoke in this way: that his seed would live as aliens in a strange land, and that they would be enslaved and mistreated for four hundred years.

Reference Verses:
Genesis Chapter 15 Verse 13He said to Abram, "Know for sure that your seed will live as foreigners in a land that is not theirs, and will serve them. They will afflict them four hundred years.
Exodus Chapter 3 Verse 10Come now therefore, and I will send you to Pharaoh, that you may bring my people, the children of Israel, out of Egypt."
Exodus Chapter 12 Verse 40Now the time that the children of Israel lived in Egypt was four hundred thirty years.