The Holy Quran 25:27 — Surah Al-Furqan

Arabic text

وَيَوْمَ يَعَضُّ ٱلظَّالِمُ عَلَىٰ يَدَيْهِ يَقُولُ يَـٰلَيْتَنِى ٱتَّخَذْتُ مَعَ ٱلرَّسُولِ سَبِيلًا

Translation

(Remember that this is) The day when the oppressor (the Mushrik Uqba bin Abi Mu'eet, who forsook Islaam to please his friend Ubay bin Khalaf) will bite his hands (his fingers out of regret) saying, "If only I had chosen the path (to guidance and salvation) with the Rasool ﷺ!"

Tafsir (excerpt) — Tafsir Usmani

The extreme anguish and remorse of the disbeliever: that is, out of anguish and remorse he will bite his hands and lament: “Why did I not take the path of the Messenger of Allah ﷺ in the world, and why did I fall for the seduction of the devils among men and jinn, so that today I have had to see this evil day?”

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