Romans 6:16
Do you not know that if you present yourselves to anyone as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness?
John 8:34
Jesus answered them, "Truly, truly, I say to you, everyone who commits sin is a slave to sin.
2 Peter 2:19
They promise them freedom, but they themselves are slaves of corruption. For whatever overcomes a person, to that he is enslaved.
Matthew 6:24
"No one can serve two masters, for either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve God and money.
Joshua 24:15
And if it is evil in your eyes to serve the LORD, choose this day whom you will serve, whether the gods your fathers served in the region beyond the River, or the gods of the Amorites in whose land you dwell. But as for me and my house, we will serve the LORD."
Romans 6:12-13
Let not sin therefore reign in your mortal body, to make you obey its passions.
Romans 6:17
But thanks be to God, that you who were once slaves of sin have become obedient from the heart to the standard of teaching to which you were committed,
Romans 6:19-23
I am speaking in human terms, because of your natural limitations. For just as you once presented your members as slaves to impurity and to lawlessness leading to more lawlessness, so now present your members as slaves to righteousness leading to sanctification.