I Corinthians 6:

9Do you not know that the wicked will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor male prostitutes nor homosexual offenders 10nor thieves nor the greedy nor drunkards nor slanderers nor swindlers will inherit the kingdom of God. 11And that is what some of you were. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God.

12"Everything is permissible for me"—but not everything is beneficial. "Everything is permissible for me"—but I will not be mastered by anything. 13"Food for the stomach and the stomach for food"—but God will destroy them both. The body is not meant for sexual immorality, but for the Lord, and the Lord for the body. 14By his power God raised the Lord from the dead, and he will raise us also. 15Do you not know that your bodies are members of Christ himself? Shall I then take the members of Christ and unite them with a prostitute? Never! 16Do you not know that he who unites himself with a prostitute is one with her in body? For it is said, "The two will become one flesh."[b] 17But he who unites himself with the Lord is one with him in spirit.

18Flee from sexual immorality.

and when Jesus was dealing with the woman taken in adultery, she is told to 'Go and sin no more'.

Or perhaps as Jesus expresses it in the parable of the wedding feast, in Matthew 22:

11 "But when the king came in to see the guests, he noticed a man there who was not wearing wedding clothes. 12 'Friend,' he asked, 'how did you get in here without wedding clothes?' The man was speechless' 13 Then the king told the attendants, 'Tie him hand and foot, and throw him outside, into the darkness, where there will be weeping and gnashing of teeth.'