سورة Al-Furqan 25:35

وَلَقَدْ ءَاتَيْنَا مُوسَى ٱلْكِتَـٰبَ وَجَعَلْنَا مَعَهُۥٓ أَخَاهُ هَـٰرُونَ وَزِيرًۭا ٣٥

We certainly gave Moses the Book and appointed his brother Aaron as his helper