وَاَوۡفُوا الۡكَيۡلَ اِذَا كِلۡتُمۡ وَزِنُوۡا بِالۡقِسۡطَاسِ الۡمُسۡتَقِيۡمِؕ ذٰلِكَ خَيۡرٌ وَّاَحۡسَنُ تَاۡوِيۡلًا

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