Acts 8:23
For I perceive that you are in the gall of bitterness, and in the bond of iniquity.
Hebrews 12:15
taking care, lest any one slight the grace of God; lest any root of bitterness spring up and trouble you, and by this many be defiled;
John 8:34
Jesus answered them: Verily, verily I say to you, whoever works sin is the servant of sin.
Romans 6:17-22
But thanks be to God, that though you were the servants of sin, yet you have obeyed from the heart the form of teaching, in which you have been instructed;
Titus 3:3
For we ourselves also were formerly foolish, disobedient, deceived, serving various desires and pleasures, living in malice and envy, hateful, and hating one an other.
2 Peter 2:4
For if God spared not the angels that sinned, but cast them down to Tartarus, and delivered them over to chains of darkness, to be kept for judgment;
2 Peter 2:19
While they promise them freedom, they themselves are the servants of corruption: for by whatever any man is overcome, he is also enslaved.