'Slaves' in the Bible

But Solomon did not consign the Israelites to be slaves for his work; they were soldiers, commanders of his captains, and commanders of his chariots and his cavalry.

Nevertheless, they will become his slaves so they may learn to differentiate between what it means to serve me and to serve the kingdoms of these nations."

Now you're intending to make the men and women of Judah and Jerusalem to be your slaves. Surely you have your own sins against the LORD your God for which you're accountable, don't you?