The Holy Quran 4:116 — Surah An-Nisa
Arabic text
إِنَّ ٱللَّهَ لَا يَغْفِرُ أَن يُشْرَكَ بِهِۦ وَيَغْفِرُ مَا دُونَ ذَٰلِكَ لِمَن يَشَآءُ ۚ وَمَن يُشْرِكْ بِٱللَّهِ فَقَدْ ضَلَّ ضَلَـٰلًۢا بَعِيدًا
Translation
Verily Allaah shall not forgive that Shirk be committed but will forgive all other sins for whom He wills. Whoever ascribes partners to Allaah (commits Shirk) has strayed far away (from the truth).
Tafsir (excerpt) — Tafsir Usmani
Shirk is an unforgivable sin: that is, sins below shirk (associating partners with Allah) Allah will forgive for whomever He wills, but shirk He will never forgive: for the mushrik (idolater) He has already decreed nothing but punishment.
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