1 Corinthians 6:15-19

Know ye not that your bodies are the members of Christ? Shall I then take the members of Christ and make them the members of a harlot? In no wise. What? know ye not that he who is joined to the harlot is one body with her? For they shall be, saith he, two in one flesh. But he that is joined unto the Lord is one spirit. Flee fornication. Any other sin that a man does is outside the body, but he that commits fornication sins against his own body. What? know ye not that your body is the temple of the Holy Spirit who is in you, whom ye have of God, and that ye are not your own?