'Enslaved' in the Bible

God said to Abram, “Know for certain that your descendants will be strangers in a land that is not theirs, where they will be enslaved and oppressed four hundred years.

And it will be in the day when the Lord gives you rest from your pain and turmoil and harsh service in which you have been enslaved,

Also the tree of the field will yield its fruit and the earth will yield its increase, and they will be secure on their land. Then they will know that I am the Lord, when I have broken the bars of their yoke and have delivered them from the hand of those who enslaved them.