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 1 year ago

He needs to repent and decide not to commit such crime again and seek forgiveness from Allah (SWT) but he does not need to divorce his wife.

Committing such major sin is strongly forbidden and condemned and the knowledge or no knowledge of his wife does not change the rule.