Hud - 11:84

وَإِلَى مَدْيَنَ أَخَاهُمْ شُعَيْبًا قَالَ يَا قَوْمِ اعْبُدُواْ اللّهَ مَا لَكُم مِّنْ إِلَـهٍ غَيْرُهُ وَلاَ تَنقُصُواْ الْمِكْيَالَ وَالْمِيزَانَ إِنِّيَ أَرَاكُم بِخَيْرٍ وَإِنِّيَ أَخَافُ عَلَيْكُمْ عَذَابَ يَوْمٍ مُّحِيطٍ
[11:84]
And to Madyan (We sent) their brother Shu'aib. He said: O my people! serve Allah, you have no god other than He, and do not give short measure and weight: surely I see you in prosperity and surely I fear for you the punishment of an all-encompassing day.
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.
And unto Midian (We sent) their brother Shu'eyb. He said: O my people! Serve Allah. Ye have no other Allah save Him! And give not short measure and short weight. Lo! I see you well-to-do, and lo! I fear for you the doom of a besetting Day.