Surah Ali 'Imran 3:63

فَإِن تَوَلَّوْا۟ فَإِنَّ ٱللَّهَ عَلِيمٌۢ بِٱلْمُفْسِدِينَ

But if they turn away, then indeed - Allāh is Knowing of the corrupters.

Translation: Saheeh International

Tafsir

And if they turn their backs rejecting faith assuredly God knows the agents of corruption and will requite them here the third person pronominalisation has been replaced with the overt noun al-mufsidūn ‘the agents of corruption’.

Excerpt from Tafsir al-Jalalayn, commentary on 3:63, via Quran.com. The reader has the full commentary and 9 more tafsirs.