وَلَقَدۡ قَالَ لَهُمۡ هَٰرُونُ مِن قَبۡلُ يَٰقَوۡمِ إِنَّمَا فُتِنتُم بِهِۦۖ وَإِنَّ رَبَّكُمُ ٱلرَّحۡمَٰنُ فَٱتَّبِعُونِي وَأَطِيعُوٓاْ أَمۡرِي ٩٠
And Aaron had already told them before [the return of Moses], "O my people, you are only being tested by it, and indeed, your Lord is the Most Merciful, so follow me and obey my order."
Translation: Saheeh International (English)
Each word's meaning and sound
Aaron had said to them before Moses returned to them: “The making of the calf from gold and its mooing are only to test you, to distinguish the believer from the disbeliever. And your Lord, O people, is Allah, so follow me by worshipping Him alone and obey my command to leave worshipping others besides Him”.
Al-Mukhtasar in interpreting the Noble Quran