Quran 66:8 — Prohibition (Al-Tahreem)

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."

[66:7] O you who disbelieved, do not apologize today. You are being requited only for what you did.

[66:9] O prophet, struggle against the disbelievers and the hypocrites and be stern with them. Their abode is Gehenna, and a miserable destiny.