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The Historic Faith
Scripture Topic Guide

Bible Verses About Fornication

Early Christian writers taught that fornication was a serious sin that Christians had to avoid, not a minor mistake. Hermas, Justin Martyr, Theophilus of Antioch, Clement of Alexandria, Tertullian, Cyprian, and the Apostolic Constitutions all warn against it, often tying it to chastity, purity, and the need to live in holiness.

Many writers also connect fornication with adultery, lust, uncleanness, and exclusion from the kingdom of God, using Bible passages such as 1 Corinthians 6:18, Galatians 5:19, Ephesians 5:3, Hebrews 13:4, and 1 Thessalonians 4:3. The evidence is broad and strong across the early centuries, though some later texts push into related topics like marriage, celibacy, or symbolic uses of the word. A few cards are only indirect or use the term in background ways, so the main view stays focused on direct moral teaching.

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Key Passages

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How to Study Fornication

A tighter path from the primary text into context and application.

Start with the clearest command or anchor text Read the primary passage in context before building doctrine from supporting references.
Trace the apostolic pattern Compare how the apostles preached, practiced, warned, and applied this topic in the churches.
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Scripture Map

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23 references

Foundation Texts

Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body.

Direct command to flee sexual immorality and notes it is a bodily sin.

Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,

Lists fornication among the works of the flesh.

But fornication, and all uncleanness, or covetousness, let it not be once named among you, as becometh saints;

Says fornication should not even be named among saints.

Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry:

Direct passage from Colossians against fornication

For this is the will of God, even your sanctification, that ye should abstain from fornication:

Calls abstaining from fornication God's will.

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

Says God will judge fornicators and adulterers.

Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.

Places sex within marriage to avoid fornication.

Supporting Passages

Who being past feeling have given themselves over unto lasciviousness, to work all uncleanness with greediness.

Supports the vice list theme

It is reported commonly that there is fornication among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife.

Shows sexual immorality as a serious church problem.

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.

Says no whoremonger has inheritance in God's kingdom.

Neither let us commit fornication, as some of them committed, and fell in one day three and twenty thousand.

Warns not to commit sexual immorality like Israel did.

What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh.

Says union with a harlot makes one body.

Wherefore God also gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves:

Connects lustful uncleanness with dishonoring the body.

Now concerning the things whereof ye wrote unto me: It is good for a man not to touch a woman.

Marriage context, but the wording is truncated and indirect

Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.

Uses incontinency language around marital relations.

For whoremongers, for them that defile themselves with mankind, for menstealers, for liars, for perjured persons, and if there be any other thing that is contrary to sound doctrine;

Lists whoremongers among those opposed to sound doctrine.

For the time past of our life may suffice us to have wrought the will of the Gentiles, when we walked in lasciviousness, lusts, excess of wine, revellings, banquetings, and abominable idolatries:

Lists lusts and abominable idolatries in a vice warning.

Thefts, covetousness, wickedness, deceit, lasciviousness, an evil eye, blasphemy, pride, foolishness:

Scripture passage attached to the early Christian evidence page.

Thus she committed her whoredoms with them, with all them that were the chosen men of Assyria, and with all on whom she doted: with all their idols she defiled herself.

Scripture passage attached to the early Christian evidence page.

Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world.

Separates believers from fornicators in the world

That every one of you should know how to possess his vessel in sanctification and honour;

Calls believers to holiness in how they use their bodies.

For God hath not called us unto uncleanness, but unto holiness.

Holiness versus impurity

Nevertheless he that standeth stedfast in his heart, having no necessity, but hath power over his own will, and hath so decreed in his heart that he will keep his virgin, doeth well.

Supports voluntary keeping of virginity