Matthew 5:28 - but I tell you that everyone who gazes at a woman to lust after her has committed adultery with her already in his heart.
1 Corinthians 6:18 - Flee sexual immorality! "Every sin that a man does is outside the body," but he who commits sexual immorality sins against his own body.
Luke 16:18 - Everyone who divorces his wife, and marries another, commits adultery. He who marries one who is divorced from a husband commits adultery.
Exodus 20:14 - "You shall not commit adultery.
1 Peter 4:3 - For we have spent enough of our past time doing the desire of the Gentiles, and having walked in lewdness, lusts, drunken binges, orgies, carousings, and abominable idolatries.