1 Corinthians 6:14-17

And God both raised the Lord to life and will also raise us up by His power. Do you not see and know that your bodies are members (bodily parts) of Christ (the Messiah)? Am I therefore to take the parts of Christ and make [them] parts of a prostitute? Never! Never! Or do you not know and realize that when a man joins himself to a prostitute, he becomes one body with her? The two, it is written, shall become one flesh. [Gen. 2:24.] But the person who is united to the Lord becomes one spirit with Him.