Romans 6:16
Know ye not, that whomever ye choose to obey as a master, his bondmen ye are, whether of sin whose fruit is death, or of obedience whose fruit is righteousness?
John 8:34
Jesus answered them, Truly, truly do I say to you, Every one that committeth sin is a bondservant of sin.
2 Peter 2:19
promising them liberty, while they themselves are slaves of corruption; for by what a man is overcome, by the same is he also brought into bondage.
Matthew 6:24
No one can serve two masters; for either he will hate one, and love the other; or else he will cleave to one, and despise the other. Ye cannot serve God and mammon.
Romans 6:12-13
Let not then sin reign in your mortal body, bringing you into subjection to its lusts,
Romans 6:17
But thanks be to God that, though ye were the bondmen of sin, ye became obedient from the heart to that form of teaching which was delivered to you;
Romans 6:19-23
I speak in a way common among men on account of the weakness of your flesh. For as ye once yielded your members as slaves to impurity and to iniquity, in order to commit iniquity, so now yield your members as bondmen to righteousness in order to become holy.