The Cow - 2:192
If they cease, Allah is Forgiving, Merciful.
Allah is the Forgiver of all sins:
The Heights/7:153
For those who repent and believe after they have done evil, your Lord is Forgiving, Merciful after that.
The Spoils of War/8:38
"Say to those who disbelieve: "If they cease, what they did in the past will be forgiven. If they turn back, the Sunnah (law) of those who were before is valid."
The Bee/16:119
Nevertheless, your Lord is Forgiving, Merciful to those who do evil out of ignorance, then repent and reform, yes, your Lord is Forgiving, Merciful after that.
The Ants/27:11
But whoever wrongs, then forsakes his sins and does good, I am Forgiving, Merciful.
The Companies/39:53
"Inform them: "My servants who transgressed against themselves, do not despair of Allah´s mercy. Allah is the Forgiver of all sins. He is Forgiving, Merciful."
The Prohibition/66:8
"O you who believe, repent sincerely to Allah so that your Lord may cover your evil deeds and admit you into Gardens beneath which rivers flow. Allah will not disgrace the Messenger and those who are with him on that Day. Their light will spread from their front to their right side and they will say: "Our Lord, complete our light for us and forgive us; You are the Almighty."