'Immorality' in the Bible

It is widely reported that there is sexual immorality among you, and the kind of sexual immorality that is not even tolerated among the Gentiles—a man is living with his father’s wife.

But actually, I have written to you not to associate with any so-called [Christian] brother if he is sexually immoral or greedy, or is an idolater [devoted to anything that takes the place of God], or is a reviler [who insults or slanders or otherwise verbally abuses others], or is a drunkard or a swindler—you must not so much as eat with such a person.

“Food for the stomach and the stomach for food,” but God will do away with both of them. The body is not for sexual immorality but for the Lord, and the Lord for the body.

Run from sexual immorality! “Every sin a person can commit is outside the body.” On the contrary, the person who is sexually immoral sins against his own body.

But because sexual immorality is so common, each man should have his own wife, and each woman should have her own husband.

Let us not commit sexual immorality as some of them did, and in a single day 23,000 people fell dead.