Romans 6:16
by no means. know ye not, that to whom ye subject your selves vassals at command, his vassals you are whom you thus obey; the vassals either of sin to destruction, or of obedience to justification?
John 8:34
Jesus answered them, I declare unto you, whosoever committeth sin, is a slave to sin.
2 Peter 2:19
whilst they promise others liberty, they themselves are slaves to their corrupt passions. for he that is vanquished, is a slave to the conqueror.
Matthew 6:24
no man can serve two masters: for either he will hate the one, and love the other; or he will be attach'd to the one, and neglectful of the other. ye cannot serve God and Mamon.
Romans 6:12-13
Let not sin therefore reign in your mortal body, by making you slaves to the lusts thereof.
Romans 6:17
but God be thanked, that you, who were the vassals of sin, have sincerely obeyed in the manner the gospel prescribed.
Romans 6:19-23
(I allude to civil affairs, because of your unacquaintedness with spiritual matters:) as then you made your natural faculties subservient to impurity, and all manner of vice; make them now subservient to virtue and holiness.