Matthew 5:28
I, however, say to you that any one who looks at a woman with an impure intention has already committed adultery with her in his heart.
1 Corinthians 6:9-11
Do not you know that wrong-doers will have no share in God's Kingdom? Do not be deceived. No one who is immoral, or an idolater, or an adulterer, or licentious, or a sodomite,
1 Corinthians 10:20
No; what I say is that the sacrifices offered by the Gentiles 'are offered to demons and to a Being who is no God,' and I do not want you to share with demons.
Galatians 5:19-21
The sins of our earthly nature are unmistakable. They are sins like these--unchastity, impurity, indecency,
Hebrews 13:4
Let marriage be honoured by all and the married life be pure; for God will judge those who are immoral and those who commit adultery.