Catechisma

Q72. What is forbidden in the seventh commandment?

The seventh commandment forbiddeth all unchaste thoughts, words, and actions.

Scripture Proofs — King James Version

1

Matthew 5:28

But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart.

Matthew 15:19

For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:

Ephesians 5:3–4

But fornication, and all uncleanness, or covetousness, let it not be once named among you, as becometh saints; Neither filthiness, nor foolish talking, nor jesting, which are not convenient: but rather giving of thanks.

CommentaryThomas Vincent (1674)

Question 1. What are the sins forbidden in the seventh commandment?

Answer. The sins forbidden in the seventh commandment, is all unchastity and uncleanness, Eph. 5:3. "Fornication and uncleanness, let it not be once named among you."

Question 2. Wherein is all unchastity and uncleanness forbidden?