Read Exodus 21:2 Using Other Translations
If thou buy an Hebrew servant, six years he shall serve: and in the seventh he shall go out free for nothing.
When you buy a Hebrew slave, he shall serve six years, and in the seventh he shall go out free, for nothing.
“If you buy a Hebrew slave, he may serve for no more than six years. Set him free in the seventh year, and he will owe you nothing for his freedom.