Surah An-Naba 78:26
جَزَآءً وِفَاقًا
An appropriate recompense.
Translation: Saheeh International
Tafsir
as a fitting requital one that accords with the nature of their deeds for there is no sin greater than disbelief and no chastisement greater than the Fire.
Excerpt from Tafsir al-Jalalayn, commentary on 78:26, via Quran.com. The reader has the full commentary and 9 more tafsirs.