'Immorality' in the Bible

It is actually reported that there is immorality among you, and immorality of such a kind as does not exist even among the Gentiles, that someone has his father’s wife.

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

Flee immorality. Every other sin that a man commits is outside the body, but the immoral man sins against his own body.