Heidelberg Catechism · 1563

Q108. What does the seventh commandment teach us?

That all unchastity is cursed by God. We must therefore detest it from the heart and live chaste and disciplined lives, both within and outside of holy marriage.
Answer · Heidelberg Catechism

Scripture proofs

  1. [1]
    Leviticus 18:30

    Therefore shall ye keep mine ordinance, that ye commit not any one of these abominable customs, which were committed before you, and that ye defile not yourselves therein: I am the Lord your God.

    Ephesians 5:3-5

    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. For this ye know, that no whoremonger, nor unclean person, nor covetous man, who is an idolater, hath any inheritance in the kingdom of Christ and of God.

  2. [2]
    Jude 1:22-23

    And of some have compassion, making a difference: And others save with fear, pulling them out of the fire; hating even the garment spotted by the flesh.

  3. [3]
    1 Corinthians 7:1-9

    Now concerning the things whereof ye wrote unto me: It is good for a man not to touch a woman. Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband. Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband. …

    1 Thessalonians 4:3-8

    For this is the will of God, even your sanctification, that ye should abstain from fornication: That every one of you should know how to possess his vessel in sanctification and honour; Not in the lust of concupiscence, even as the Gentiles which know not God: …

    Hebrews 13:4

    Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.

Proof texts as given in the original; verse text from the King James Version.