Romans 6:16
Know you not that to whom you present yourselves servants for obedience, his servants you are whom you obey, whether of sin in death or of obedience in righteousness?
John 8:34
Jesus answered them, I tell you most truly, that every one who commits sin is a servant of the sin.
2 Peter 2:19
promising them liberty, when they themselves are servants of corruption; for by whatever a man is overcome, to this is he made a servant.
Matthew 6:24
No one can serve two masters; for either he will hate the first, and love the other, or he will adhere to the first, and despise the other. You cannot serve God and riches.
Romans 6:12-13
Let not sin therefore reign in your mortal bodies, to obey its desires,
Romans 6:17
But thanks be to God that you were servants of sin, but obeyed from the heart the form of teaching in which you were instructed,
Romans 6:19-23
I speak after the manner of men on account of the weakness of your flesh. For as you presented your members servants to impurity and to wickedness in wickedness, so now present your members servants to righteousness in sanctification.