Surah Ghafir 40:77

فَٱصْبِرْ إِنَّ وَعْدَ ٱللَّهِ حَقٌّ ۚ فَإِمَّا نُرِيَنَّكَ بَعْضَ ٱلَّذِى نَعِدُهُمْ أَوْ نَتَوَفَّيَنَّكَ فَإِلَيْنَا يُرْجَعُونَ

So be patient, [O Muḥammad]; indeed, the promise of Allāh is truth. And whether We show you some of what We have promised them or We take you in death, it is to Us they will be returned.

Translation: Saheeh International

Tafsir

So be patient. Assuredly God’s promise to chastise them is true. And if We show you fa-immā contains an assimilated conditional particle in; the mā is extra and emphasises the conditional import at the beginning of the verb while the nūn emphasises it at the end a part of what We promise them of chastisement in your …

Excerpt from Tafsir al-Jalalayn, commentary on 40:77, via Quran.com. The reader has the full commentary and 9 more tafsirs.