Surah Al-Isra (الإسراء) Ayah 35 - Tafsir

وَأَوْفُوا۟ ٱلْكَيْلَ إِذَا كِلْتُمْ وَزِنُوا۟ بِٱلْقِسْطَاسِ ٱلْمُسْتَقِيمِ ۚ ذَٰلِكَ خَيْرٌۭ وَأَحْسَنُ تَأْوِيلًۭا

"And give full measure when you measure, and weigh with an even balance. That is the best [way] and best in result."