1 Corinthians 6:15-7:5

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.” Gen. 2:24

17But whoever is united with the Lord is one with him in spirit. Or in the Spirit 18Flee from sexual immorality. All other sins a person commits are outside the body, but whoever sins sexually, sins against their own body. 19Do you not know that your bodies are temples of the Holy Spirit, who is in you, whom you have received from God? You are not your own; 20you were bought at a price. Therefore honor God with your bodies.

Concerning Married Life 1Now for the matters you wrote about: “It is good for a man not to have sexual relations with a woman.” 2But since sexual immorality is occurring, each man should have sexual relations with his own wife, and each woman with her own husband. 3The husband should fulfill his marital duty to his wife, and likewise the wife to her husband. 4The wife does not have authority over her own body but yields it to her husband. In the same way, the husband does not have authority over his own body but yields it to his wife. 5Do not deprive each other except perhaps by mutual consent and for a time, so that you may devote yourselves to prayer. Then come together again so that Satan will not tempt you because of your lack of self-control.