Al Isra’ Ayah 35

وَأَوْفُواْ ٱلْكَيْلَ إِذَا كِلْتُمْ وَزِنُواْ بِٱلْقِسْطَاسِ ٱلْمُسْتَقِيمِ‌ۚ ذَٲلِكَ خَيْرٌ وَأَحْسَنُ تَأْوِيلاً ٣٥ Give in full when you measure, and weigh with an even balance. That is fairest and best in the end.