Romans 6:16-18

16 Don't you realize that if you make yourselves someone's slaves, obeying their orders, then you are slaves to the one you obey? If you are slaves of sin, the result is death; if you obey God, the result is you are made right with him.

17 Thank God that though you once were slaves to sin, you whole-heartedly chose to follow the truth about God that you learned.

18 Now that you've been freed from sin, you've become slaves of doing what is morally right.