'Serves' in the Bible

If your brother, a Hebrew man, or a Hebrew woman, is sold to you, and serves you six years; then in the seventh year you shall let him go free from you.

They shall be mine," says Yahweh of Armies, "my own possession in the day that I make, and I will spare them, as a man spares his own son who serves him.

Then you shall return and discern between the righteous and the wicked, between him who serves God and him who doesn't serve him.