'Incest' in the Bible

If there is a man who lies with his daughter-in-law, both of them shall surely be put to death; they have committed incest, their bloodguiltiness is upon them.

you are to hand over this man to Satan for the destruction of his body, so that his spirit may be saved in the day of the Lord Jesus.

But if someone has caused [all this] sorrow, he has caused it not to me, but in some degree—not to put it too severely—[he has distressed and grieved] all of you.

For [you can look back and] see what an earnestness and authentic concern this godly sorrow has produced in you: what vindication of yourselves [against charges that you tolerate sin], what indignation [at sin], what fear [of offending God], what longing [for righteousness and justice], what passion [to do what is right], what readiness to punish [those who sin and those who tolerate sin]! At every point you have proved yourselves to be innocent in the matter.