وَإِلىٰ مَديَنَ أَخاهُم شُعَيبًا ۚ قالَ يا قَومِ اعبُدُوا اللَّهَ ما لَكُم مِن إِلـٰهٍ غَيرُهُ ۖ وَلا تَنقُصُوا المِكيالَ وَالميزانَ ۚ إِنّي أَراكُم بِخَيرٍ وَإِنّي أَخافُ عَلَيكُم عَذابَ يَومٍ مُحيطٍ

And to Madyan [We sent] their brother Shu'ayb. He said, "O my people, worship Allah; you have no deity other than Him. And do not decrease from the measure and the scale. Indeed, I see you in prosperity, but indeed, I fear for you the punishment of an all-encompassing Day.