[Surah Az-Zumar 39:53]: Say [that Allah declares,] ‘O My servants who have committed excesses against their own souls, do not despair of the mercy of Allah. Indeed Allah will forgive all sins. Indeed, He is the All-forgiving, the All-merciful.
The Holy Prophet (PBUH&HP) said: The best of you is the one who treats most moderately and behaves most graciously (and honorably) with his wife. (Dalael Al-Imamah, P. 76)