Quran 26:182 from Surah Ash-Shu'araa on Divine Marvels.
وَزِنُواْ بِٱلۡقِسۡطَاسِ ٱلۡمُسۡتَقِيمِ
English translation: And weigh with a balance [the] even
Transliteration: wazinu bil-qis'tasi al-mus'taqimi