Surah Ar-Rahman, ayah 9

وَأَقِيمُواْ ٱلۡوَزۡنَ بِٱلۡقِسۡطِ وَلَا تُخۡسِرُواْ ٱلۡمِيزَانَ ٩

Wa aqīmul-wazna bil-qisti walā tukhsirul-mīzān

And establish weight in justice and do not make deficient the balance.