Romans 6:18

Don't you know that to whom you present yourselves as servants to obedience, his servants you are whom you obey; whether of sin to death, or of obedience to righteousness?

But thanks be to God, that, whereas you were bondservants of sin, you became obedient from the heart to that form of teaching whereunto you were delivered.

I speak in human terms because of the weakness of your flesh, for as you presented your members as servants to uncleanness and to wickedness upon wickedness, even so now present your members as servants to righteousness for sanctification.

For when you were servants of sin, you were free in regard to righteousness.