Quran 83:2 from Surah Al-Mutaffifin on Divine Marvels.
ٱلَّذِينَ إِذَا ٱكۡتَالُواْ عَلَى ٱلنَّاسِ يَسۡتَوۡفُونَ
English translation: Those who when they take a measure from the people they take in full
Transliteration: alladhina idha ik'talu ala al-nasi yastawfuna