Surah Al-Furqan 25:27

وَيَوْمَ يَعَضُّ ٱلظَّالِمُ عَلَىٰ يَدَيْهِ يَقُولُ يَـٰلَيْتَنِى ٱتَّخَذْتُ مَعَ ٱلرَّسُولِ سَبِيلًا

And the Day the wrongdoer will bite on his hands [in regret] he will say, "Oh, I wish I had taken with the Messenger a way.

Translation: Saheeh International

Tafsir

And it will be a day when the wrongdoer the idolater ‘Uqba b. Abī Mu‘ayt — who had uttered the two-part profession ‘there is no god but God Muhammad (s) is His Messenger’ but retracted it in order to please Ubayy b. …

Excerpt from Tafsir al-Jalalayn, commentary on 25:27, via Quran.com. The reader has the full commentary and 9 more tafsirs.