Surah Hud (Hud), Verse 84

وَاِلٰی مَدْیَنَ اَخَاهُمْ شُعَیْبًا قَالَ یٰقَوْمِ اعْبُدُوا اللّٰهَ مَا لَكُمْ مِّنْ اِلٰهٍ غَیْرُهٗ وَلَا تَنْقُصُوا الْمِكْیَالَ وَالْمِیْزَانَ اِنِّیْۤ اَرٰىكُمْ بِخَیْرٍ وَّاِنِّیْۤ اَخَافُ عَلَیْكُمْ عَذَابَ یَوْمٍ مُّحِیْطٍ ۟

Wa ilaa Madyana akhaahum Shu'aibaa; qaala yaa qawmi' budul laaha maa lakum min ilaahin ghairuhoo wa laa tanqusul mikyaala walmeezaan; inneee araakum bikhairinw wa innee akhaafu 'alaikum 'azaaba Yawmim muheet

“To the Madyan People (We sent) Shu'aib, one of their own brethren: he said: "O my people! worship Allah: Ye have no other god but Him. And give not short measure or weight: I see you in prosperity, but I fear for you the penalty of a day that will compass (you) all round.”

Quran 11:84 (Yusuf Ali Translation)