Surah Ta-Ha (Ta-Ha), Verse 90

وَلَقَدْ قَالَ لَهُمْ هٰرُوْنُ مِنْ قَبْلُ یٰقَوْمِ اِنَّمَا فُتِنْتُمْ بِهٖ وَاِنَّ رَبَّكُمُ الرَّحْمٰنُ فَاتَّبِعُوْنِیْ وَاَطِیْعُوْۤا اَمْرِیْ ۟

Wa laqad qaala lahum Haaroonu min qablu yaa qawmi innamaa futintum bihee wa inna Rabbakumur Rahmaanu fattabi'oonee wa atee'ooo amree

“Aaron had already, before this said to them: "O my people! ye are being tested in this: for verily your Lord is (Allah) Most Gracious; so follow me and obey my command."”

Quran 20:90 (Yusuf Ali Translation)