Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 10 months ago

Zina ( fornication) is one of the most dangerous major sins mentioned in Quran and Hadeeths .

Repenting it needs:

1. Real feeling of sadness and sorrow for committing this major sin.
2. Establishing firm decision not to commit it again under any circumstance.

3. repeating Estighfaar ( seeking forgiveness) day and night especially when you are alone and during Sojood ( prostration).