Surah Al-An'am 6:157

أَوْ تَقُولُوا۟ لَوْ أَنَّآ أُنزِلَ عَلَيْنَا ٱلْكِتَـٰبُ لَكُنَّآ أَهْدَىٰ مِنْهُمْ ۚ فَقَدْ جَآءَكُم بَيِّنَةٌ مِّن رَّبِّكُمْ وَهُدًى وَرَحْمَةٌ ۚ فَمَنْ أَظْلَمُ مِمَّن كَذَّبَ بِـَٔايَـٰتِ ٱللَّهِ وَصَدَفَ عَنْهَا ۗ سَنَجْزِى ٱلَّذِينَ يَصْدِفُونَ عَنْ ءَايَـٰتِنَا سُوٓءَ ٱلْعَذَابِ بِمَا كَانُوا۟ يَصْدِفُونَ

Or lest you say, "If only the Scripture had been revealed to us, we would have been better guided than they." So there has [now] come to you a clear evidence from your Lord and a guidance and mercy. Then who is more unjust than one who denies the verses of Allāh and turns away from them? We will recompense those who turn away from Our verses with the worst of punishment for their having turned away.

Translation: Saheeh International

Tafsir

Or lest you should say ‘If the Scripture had been revealed to us we would have surely been more rightly guided than they are’ because of the excellence of our minds. Now indeed a clear proof a clear statement has come to you from your Lord and a guidance and a mercy for him who follows it; …

Excerpt from Tafsir al-Jalalayn, commentary on 6:157, via Quran.com. The reader has the full commentary and 9 more tafsirs.