Romans 6:16
Remember ye not how that to whomsoever ye commit yourselves as servants to obey, his servants ye are to whom ye obey: whether it be of sin unto death, or of obedience unto righteousness?
John 8:34
Jesus answered them, "Verily, verily I say unto you, That whosoever committeth sin, is the servant of sin.
2 Peter 2:19
They promise them liberty, and are themselves the bondservants of corruption. For of whomsoever a man is overcome, unto the same is he in bondage.
Matthew 6:24
No man can serve two masters: For either he shall hate the one, and love the other; or else he shall lean to the one, and despise the other. Ye cannot serve God and mammon.
Joshua 24:15
But if it seem evil unto you to serve the LORD, then choose you this day, whom you will serve: whether the gods which your fathers served, that were on the other side of the water, or the gods of the Amorites in whose land, ye dwelt. As for me and my house, we will serve the LORD."
Romans 6:12-13
Let not sin reign therefore in your mortal bodies, that ye should thereunto obey in the lusts of it.
Romans 6:17
God be thanked, that though ye were once the servants of sin, ye have yet obeyed with your heart unto the form of doctrine where unto ye were delivered.
Romans 6:19-23
I will speak grossly because of the infirmity of your flesh. As ye have given your members servants to uncleanness and to iniquity, from iniquity unto iniquity: even so now give your members servants unto righteousness, that ye may be sanctified.