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How was Aaron related to Moses and Miriam?

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Aaron Aaron, detail of a 3rd-century fresco from the synagogue at Doura-Europus, Syria; in the National Museum, Damascus

According to the Hebrew Scriptures, Aaron was the brother of both Moses and Miriam. All three were children of Amram and Jochebed of the tribe of Levi.1

Aaron was three years older than Moses. Throughout the Exodus, Aaron served as a close companion to his brother, often acting as his "mouth" when addressing the pharaoh. While Aaron and Miriam once joined together to speak against Moses regarding his marriage to a woman from Kush, Aaron also stood firmly by Moses' side during other challenges, such as the rebellion of Korah.1