Here are 14 Bible verses about living together not married from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Hebrews 13:4 KJV
Marriage is honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.
1 Thessalonians 4:3-5 KJV
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:
Galatians 5:19-21 KJV
Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
1 Corinthians 6:18 KJV
Flee fornication. Every sin that a man doeth is without the body; but he that committeth fornication sinneth against his own body.
1 Corinthians 6:13 KJV
Meats for the belly, and the belly for meats: but God shall destroy both it and them. Now the body is not for fornication, but for the Lord; and the Lord for the body.
1 John 4:4 KJV
Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.
1 John 1:9 KJV
If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
1 Corinthians 7:2 KJV
Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
Revelation 21:8 KJV
But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
1 Thessalonians 5:22 KJV
Abstain from all appearance of evil.
John 4:16-18 KJV
Jesus saith unto her, Go, call thy husband, and come hither. The woman answered and said, I have no husband. Jesus said unto her, Thou hast well said, I have no husband: For thou hast had five husbands; and he whom thou now hast is not thy husband: in that saidst thou truly.
Colossians 3:5 KJV
Mortify therefore your members which are upon the earth; fornication, uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry:
1 Corinthians 6:19-20 KJV
What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s.
1 Corinthians 5:1 KJV
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.