Romans 6:16
Know ye not, that to whom ye present yourselves as'servants unto obedience, his servants ye are whom ye obey; whether of sin unto death, or of obedience unto righteousness?
John 8:34
Jesus answered them, Verily, verily, I say unto you, Every one that committeth sin is the bondservant of sin.
2 Peter 2:19
promising them liberty, while they themselves are bondservants of corruption; for of whom a man is overcome, of the same is he also brought into bondage.
Matthew 6:24
No man can serve two masters; for either he will hate the one, and love the other; or else he will hold to one, and despise the other. Ye cannot serve God and mammon.
Joshua 24:15
And if it seem evil unto you to serve Jehovah, choose you this day whom ye will serve; whether the gods which your fathers served that were beyond the River, or the gods of the Amorites, in whose land ye dwell: but as for me and my house, we will serve Jehovah.
Romans 6:12-13
Let not sin therefore reign in your mortal body, that ye should obey the lusts thereof:
Romans 6:17
But thanks be to God, that, whereas ye were servants of sin, ye became obedient from the heart to that form of teaching whereunto ye were delivered;
Romans 6:19-23
I speak after the manner of men because of the infirmity of your flesh: for as ye presented your members as'servants to uncleanness and to iniquity unto iniquity, even so now present your members as'servants to righteousness unto sanctification.