Adultery

1 Corinthians 6:9 - Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind,

1 Corinthians 6:10 - Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.
Galatians 5:19 - Now the works of the flesh are manifest, which are these; adultery, fornication, uncleanness, lasciviousness,

Galatians 5:20 - Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies,

Galatians 5:21 - Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
Hebrews 13:4 - Marriage is honorable in all, and the bed undefiled: but whoremongers and adulterers God will judge.