1 Corinthians 6:16

6:16 Or do you not know that anyone who is united with a prostitute is one body with her? For it is said, “The two will become one flesh.”

1 Corinthians 7:2

7:2 But because of immoralities, each man should have relations with his own wife and each woman with her own husband.

1 Corinthians 7:4

7:4 It is not the wife who has the rights to her own body, but the husband. In the same way, it is not the husband who has the rights to his own body, but the wife.