Surah Ash-Shu'ara, ayah 181

۞ أَوۡفُواْ ٱلۡكَيۡلَ وَلَا تَكُونُواْ مِنَ ٱلۡمُخۡسِرِينَ ١٨١

Awful-kayla walā takūnū minal-mukhsirīn

Give full measure and do not be of those who cause loss.