Zina (fornication, adultery) is a serious crime and a major sin which takes away the quality of faith from a person, and exposes him to punishment and humiliation unless he repents. Another effect of zina is that is causes him to lose the best of attributes, namely chastity, goodness and righteousness, and it earns him their opposites, namely immorality, evildoing, adultery and betrayal. Zina, alcohol and gambling are all major sins The most serious of these three major sins is zina The basic principle is that zina is the worst of the three, then alcohol, then gambling But it may vary according to the evil consequences that result from it.
To repent from zina, you should Never despair from the mercy of allah 2 Have a sincere repentance from your heart 3 Pray to god the almighty to save you from hell and award you with paradise for your repentance and good deeds. Zina is one of the worst of haraam actions and is one of the greatest of major sins Allaah has issued a warning to the mushrikeen, those who kill unlawfully and those who commit zina of a double punishment on the day of resurrection and an eternity of punishment in which they will be humiliated because of the gravity of their crime and the abhorrence of their actions, as allaah says.
“the one who repents from sin is like the one who did not sin.” for more, see the detailed answer. In the case of zina, the hadd punishment is conditional upon penetration, which means that the head of the penis disappears into the vagina If it does not penetrate it or only part of it penetrates it, then he is not subject to the hadd punishment
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