Key Verses

1. 21:47Al-Anbiya
   وَنَضَعُ ٱلۡمَوَٰزِينَ ٱلۡقِسۡطَ لِيَوۡمِ ٱلۡقِيَٰمَةِ فَلَا تُظۡلَمُ نَفۡسٞ شَيۡـٔٗاۖ وَإِن كَانَ مِثۡقَالَ حَبَّةٖ مِّنۡ خَرۡدَلٍ أَتَيۡنَا بِهَاۗ وَكَفَىٰ بِنَا حَٰسِبِينَ
   And We set a just balance for the Day of Resurrection so that no soul is wronged in aught. Though it be of the weight of a grain of mustard seed, We bring it. And We suffice for reckoners.
   In context

   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.