(Hood) 11 : 84
وَإِلَىٰ مَدْيَنَ أَخَاهُمْ شُعَيْبًا ۚ قَالَ يَا قَوْمِ اعْبُدُوا اللَّهَ مَا لَكُمْ مِنْ إِلَٰهٍ غَيْرُهُ ۖ وَلَا تَنْقُصُوا الْمِكْيَالَ وَالْمِيزَانَ ۚ إِنِّي أَرَاكُمْ بِخَيْرٍ وَإِنِّي أَخَافُ عَلَيْكُمْ عَذَابَ يَوْمٍ مُحِيطٍ
And to Midian their brother Shuaib; he said: “Oh my people, you serve Lord Allah; you have no deity except Him, and you don’t decrease in the measures and weights; indeed I see you in prosperity today, but indeed I fear for you the punishment of an encompassing day.