1 Corinthians 5:9-10
I wrote you in my letter not to associate with sexually immoral people.
Galatians 5:19-21
Now those things done by the sinful, physical nature [of a person] are evident; they are these: sexual immorality, moral impurity, indecent conduct,
Galatians 6:7-8
Do not be deceived; God will not be fooled. Whatever a person does with his life, he will reap [the results of it].
Ephesians 5:5-6
For you [should] know this for certain: No sexually immoral or [morally] impure person, or greedy person, who is [the same as] an idol worshiper, has any inheritance in the kingdom of Christ and God.
Hebrews 13:4
Marriage should be considered honorable among all people and its sexual responsibilities should be faithfully kept. For God will judge [and condemn] those people who are sexually immoral and who are sexually unfaithful to their mates.