1 Corinthians 6:15-17 New Revised Standard Version Catholic Edition (NRSVCE)
15 Do you not know that your bodies are members of Christ? Should I therefore take the members of Christ and make them members of a prostitute? Never! 16 Do you not know that whoever is united to a prostitute becomes one body with her? For it is said, “The two shall be one flesh.” 17 But anyone united to the Lord becomes one spirit with him.