Leviticus 25:44-46

By and large, the economy of the ancient Near East was never one substantially based on slave labor—as in classical and later Greece, or above all in Imperial Rome. The Old Testament does not regard the possession of slaves to be always, and under all circumstances, a moral evil. Israelites were permitted to impose the punishment of slavery upon heathen nations.

So God bans slavery between Israelites. Human nature's tendency, combined with Satan's influence to be cruel, makes it very necessary for God to include in Scripture every possible emphasis to oppose cruelty against slaves. Let us briefly look at some of the commands regarding the treatment of slaves. I have listed nine here. There may be others, but these are the nine main ones.

Leviticus 25:41-48

Now notice, this is instructions about an Israelite who gets into debt and makes himself a slave in order to get out of that debt. It is slightly different from the one that is there in Exodus 21. So the instructions here are a little different.

So slaves of a foreign country were treated differently from slaves that were Israelites, but it is still highly regulated here compared to the way it was in other nations.