'Serves' in the Bible

“If your fellow Hebrew, a man or woman, is sold to you and serves you six years, you must set him free in the seventh year.

It serves as fuel for man.He takes some of it and warms himself;also he kindles a fire and bakes bread;he even makes it into a god and worships it;he makes an idol from it and bows down to it.

“They will be Mine,” says the Lord of Hosts, “a special possession on the day I am preparing. I will have compassion on them as a man has compassion on his son who serves him.

So you will again see the difference between the righteous and the wicked, between one who serves God and one who does not serve Him.