1 Corinthians 6:15-20 (New International Version)

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."^{[a] 17}But he who unites himself with the Lord is one with him in spirit.

 ¹⁸Flee from sexual immorality. All other sins a man commits are outside his body, but he who sins sexually sins against his own body. ¹⁹Do you not know that your body is a temple 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 body.