Hārūn ibn ʿImrān (Aaron in Islam)

In the Qurʾānic narrative as summarized in the sources, Hārūn is the brother and prophetic companion of Mūsā during the Exodus era; God appointed him to assist Moses (Mūsā) and Moses prayed that God strengthen his mission with Aaron. When Moses ascended Mount Sinai (Ṭūr Sīnāʼ) for forty days, Aaron was entrusted with leadership of the Israelites; the Qurʾān stresses Aaron's attempt to prevent idolatry during the Golden Calf episode and absolves him of constructing the idol, attributing that act to the Samiri'. These elements are recorded in Islamic scripture and exegetical tradition (Source: Wikipedia summary of Aaron in Islam).

The Qurʾān itself provides no detailed earthly physical description of Aaron. Later Prophetic traditions cited in the provided materials report that Muḥammad encountered Aaron in the fifth heaven during the Miʿrāj and that early scholars mentioned Aaron's great beauty in that heavenly encounter; such remarks refer to a glorified, heavenly appearance rather than a detailed terrestrial portrait (Source: Wikipedia summary of Miʿrāj encounters and commentary).

Islamic sources presented in the summary describe Aaron primarily in prophetic and rhetorical terms: the Qurʾān calls him 'very eloquent in matters of speech and discourse,' notes that he had 'clear authority,' and states he was 'guided to the Right Path.' His roles include assisting Moses in confronting Pharaoh, exercising delegated leadership among the Israelites during Moses's absence, attempting to prevent the worship of the Golden Calf, and appearing among the prophets encountered in the Miʿrāj (Source: Wikipedia summary of Qurʾānic characterizations and Miʿrāj material).