Surah Qaf 50:29

مَا يُبَدَّلُ ٱلْقَوْلُ لَدَىَّ وَمَآ أَنَا۠ بِظَلَّـٰمٍ لِّلْعَبِيدِ

The word [i.e., decree] will not be changed with Me, and never will I be unjust to the servants."

Translation: Saheeh International

Tafsir

The word that comes from Me in this respect cannot be altered and I am not unjust to servants’ that I should chastise them without any guilt on their part zallām means dhū zulm ‘one of injustice’ because of His words There will be no injustice today Q. 4017;

Excerpt from Tafsir al-Jalalayn, commentary on 50:29, via Quran.com. The reader has the full commentary and 9 more tafsirs.