وَالْوَزْنُ يَوْمَئِذٍ الْحَقُّ فَمَن ثَقُلَتْ مَوَازِينُهُ فَأُوْلَـئِكَ هُمُ الْمُفْلِحُونَ
[7:8]
And the measuring out on that day will be just; then as for him whose measure (of good deeds) is heavy, those are they who shall be successful;
The balance that day will be true (to nicety): those whose scale (of good) will be heavy, will prosper:
The weighing on that day is the true (weighing). As for those whose scale is heavy, they are the successful.