1 Corinthians 6:9-10
Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither the immoral, nor idolaters, nor adulterers, nor sexual perverts,
Galatians 5:19-21
Now the deeds of the flesh are obvious: immorality, impurity, lewdness,
1 Timothy 1:10
and immoral men and homosexuals and kidnappers and liars and perjurers, and whatever else is contrary to sound doctrine,
Hebrews 13:4
Let marriage be held in honor among all, and let the marriage bed be undefiled; for God will judge the immoral and adulterous.
James 4:4
You adulteresses, do you not know that friendship with the world is hostility toward God? Therefore whoever wishes to be a friend of the world makes himself an enemy of God.