1 Corinthians 6:16-18

New Revised Standard Version Catholic Edition

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. ¹⁸ Shun fornication! Every sin that a person commits is outside the body; but the fornicator sins against the body itself.