Quran 7:85 — Surah Al-A'raf, ayah 85

وَإِلَىٰ مَدۡيَنَ أَخَاهُمۡ شُعَيۡبٗاۚ قَالَ يَٰقَوۡمِ ٱعۡبُدُواْ ٱللَّهَ مَا لَكُم مِّنۡ إِلَٰهٍ غَيۡرُهُۥۖ قَدۡ جَآءَتۡكُم بَيِّنَةٞ مِّن رَّبِّكُمۡۖ فَأَوۡفُواْ ٱلۡكَيۡلَ وَٱلۡمِيزَانَ وَلَا تَبۡخَسُواْ ٱلنَّاسَ أَشۡيَآءَهُمۡ وَلَا تُفۡسِدُواْ فِي ٱلۡأَرۡضِ بَعۡدَ إِصۡلَٰحِهَاۚ ذَٰلِكُمۡ خَيۡرٞ لَّكُمۡ إِن كُنتُم مُّؤۡمِنِينَ

And to [the people of] Madyan [We sent] their brother Shu'ayb. He said, "O my people, worship Allah; you have no deity other than Him. There has come to you clear evidence from your Lord. So fulfill the measure and weight and do not deprive people of their due and cause not corruption upon the earth after its reformation. That is better for you, if you should be believers

A Medjenu – njegova brata Šuajba. "O narode moj" – govorio je on – "Allahu se klanjajte, vi drugog boga osim njega nemate! Dolazi vam jasan dokaz od Gospodara vašeg, zato pravo na litri i na kantaru mjerite i ljudima stvari njihove ne zakidajte, i red na Zemlji ne remetite kad je već na njoj uspostavljen red. To je bolje za vas ako vjerujete.