Repentance is mentioned in the Quran in these verses:
[3:90] Those who disbelieve after believing, then plunge deeper into disbelief, their repentance will not be accepted from them; they are the real strayers.
[4:17] Repentance is acceptable by God from those who fall in sin out of ignorance, then repent immediately thereafter. God redeems them. God is Omniscient, Most Wise.
[4:18] Not acceptable is the repentance of those who commit sins until death comes to them, then say, “Now I repent.” Nor is it acceptable from those who die as disbelievers. For these, we have prepared a painful retribution.
[9:104] Do they not realize that God accepts the repentance of His worshipers, and takes the charities, and that God is the Redeemer, Most Merciful?
[40:3] Forgiver of sins, acceptor of repentance, strict in enforcing retribution, and possessor of all power. There is no other god beside Him. To Him is the ultimate destiny.
[42:25] He is the One who accepts the repentance from His servants, and remits the sins. He is fully aware of everything you do.
[58:13] If you failed to give to charity before conferring, then repented thereafter, God accepts your repentance. You shall observe the contact prayers (Salat), give the obligatory charity (Zakat), and obey God and His messenger. God is fully Cognizant of everything you do.
[66:8] O you who believe, you shall repent to God a firm repentance. Your Lord will then remit your sins and admit you into gardens with flowing streams. On that day, God will not disappoint the prophet and those who believed with him. Their light will radiate in front of them and to their right. They will say, “Our Lord, perfect our light for us, and forgive us; You are Omnipotent.”
To learn more, read the Quran in English.
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