Acts 8:23
For I see that you are in the gall of bitterness and in the bond of iniquity."
Hebrews 12:15
See to it that no one comes short of the grace of God; that no root of bitterness spring up and cause trouble, and by it many become defiled;
John 8:34
Jesus answered them, "Truly, truly, I say to you, everyone who commits sin is a slave of sin.
Romans 6:17-22
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,
Titus 3:3
For we ourselves were once foolish, disobedient, deceived, enslaved to various passions and pleasures, passing our days in malice and envy, hated by men and hating one another.
2 Peter 2:4
For if God did not spare angels when they sinned, but cast them into hell and committed them to pits of darkness, to be reserved for judgment;
2 Peter 2:19
They promise them freedom, while they themselves are slaves of corruption; for whatever overcomes a man, to that he is enslaved.