1 Corinthians 6:16

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."

1 Corinthians 6:16 In-Context

14 And God raised the Lord and will also raise us by his power.
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.
18 Shun fornication! Every sin that a person commits is outside the body; but the fornicator sins against the body itself.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.