Surah Al-Anbya — Ayah 47 (21:47)
وَنَضَعُ ٱلۡمَوَٰزِينَ ٱلۡقِسۡطَ لِيَوۡمِ ٱلۡقِيَٰمَةِ فَلَا تُظۡلَمُ نَفۡسٞ شَيۡـٔٗاۖ وَإِن كَانَ مِثۡقَالَ حَبَّةٖ مِّنۡ خَرۡدَلٍ أَتَيۡنَا بِهَاۗ وَكَفَىٰ بِنَا حَٰسِبِينَ ٤٧
English translation (Saheeh International)
And We place the scales of justice for the Day of Resurrection, so no soul will be treated unjustly at all. And if there is [even] the weight of a mustard seed,1 We will bring it forth. And sufficient are We as accountant.
- - i.e., anything as small or insignificant as a mustard seed.
Brief commentary
I shall establish fair scales for the rising people to weigh their deeds with. On that day, no soul shall be wronged by having its good deeds decreased, or bad deeds increased. Even if the weighed deed is minute, like the weight equal to a mustard seed, I shall include it. I Myself am sufficient to take the deeds of My servants into account.