Quran 11:85 — Hud (Hud)

وَيٰقَومِ أَوفُوا المِكيالَ وَالميزانَ بِالقِسطِ ۖ وَلا تَبخَسُوا النّاسَ أَشياءَهُم وَلا تَعثَوا فِى الأَرضِ مُفسِدينَ

"O my people, you shall give full measure and full weight, equitably. Do not cheat the people out of their rights, and do not roam the earth corruptingly.

[11:84] To Midyan we sent their brother Shu‘aib. He said, "O my people, worship GOD; you have no other god beside Him. Do not cheat when you measure or weigh. I see that you are prosperous, and I fear for you the retribution of an overwhelming day.

[11:86] "Whatever GOD provides for you, no matter how small, is far better for you, if you are really believers. I am not a guardian over you."