Surah Fussilat 41:27

فَلَنُذِيقَنَّ ٱلَّذِينَ كَفَرُوا۟ عَذَابًا شَدِيدًا وَلَنَجْزِيَنَّهُمْ أَسْوَأَ ٱلَّذِى كَانُوا۟ يَعْمَلُونَ

But We will surely cause those who disbelieve to taste a severe punishment, and We will surely recompense them for the worst of what they had been doing.

Translation: Saheeh International

Tafsir

God exalted be He says regarding them But verily We will make those who disbelieve taste a severe chastisement and We will verily requite them the worst of what they used to do in other words with the worst requital for their deeds.

Excerpt from Tafsir al-Jalalayn, commentary on 41:27, via Quran.com. The reader has the full commentary and 9 more tafsirs.