Surah An-Nisa 4:40

إِنَّ ٱللَّهَ لَا يَظْلِمُ مِثْقَالَ ذَرَّةٍ ۖ وَإِن تَكُ حَسَنَةً يُضَـٰعِفْهَا وَيُؤْتِ مِن لَّدُنْهُ أَجْرًا عَظِيمًا

Indeed, Allāh does not do injustice, [even] as much as an atom's weight; while if there is a good deed, He multiplies it and gives from Himself a great reward.

Translation: Saheeh International

Tafsir

Surely God shall not wrong anyone so much as the weight of an atom the weight of the smallest ant by diminishing thereby a person’s good deeds or increase thereby his evil deeds; …

Excerpt from Tafsir al-Jalalayn, commentary on 4:40, via Quran.com. The reader has the full commentary and 9 more tafsirs.