Fornication is "sexual intercourse between two persons not married to each other" (also for purposes other than procreation even within marriage)[1] or, more broadly, sex other than with someone you can marry, as with incest or adultery.[2]
The Apostle Paul wrote to the Corinthian church:
“ Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived; neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor homosexuals, nor thieves, nor the covetous, nor drunkards, nor revilers, nor swindlers, will inherit the kingdom of God.
Such were some of you; but you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus Christ and in the Spirit of our God.[3]