وَنَضَعُ الْمَوَازِينَ الْقِسْطَ لِيَوْمِ الْقِيَامَةِ فَلَا تُظْلَمُ نَفْسٌ شَيْئًا ۖ وَإِن كَانَ مِثْقَالَ حَبَّةٍ مِّنْ خَرْدَلٍ أَتَيْنَا بِهَا ۗ وَكَفَىٰ بِنَا حَاسِبِينَ (47)
(21:47) On the Day of Resurrection, We will set up just and accurate balances so that no one will be wronged in the least in anyway; even if it be an act equal in weight to a grain of mustard seed, We will bring it forth (to be weighed) and We suffice for reckoning. *48
*48) See also vv. 8-9 and E.N.'s 8-9 of Al-A'araf (Vll). It is difficult for us to understand the exact nature of the "Balance". Anyhow it is clear that the "Balance" will weigh accurately all the human moral deeds instead of material things, and will help judge whether a man is virtuous or wicked and how much. The Qur'an has used this word to make mankind understand that every deed, good or bad, will be weighed and judged according to merit.