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Why did Moses go up Mount Sinai without Aaron?

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

In the biblical narrative, Moses went up Mount Sinai alone because he was the only one permitted to come near to YHWH to receive the Ten Commandments and the terms of the Covenant.12

While Aaron acted as a leader and spokesperson alongside Moses during the Exodus, the tradition emphasizes that Moses held a unique role as the primary intermediary between God and the people. According to the biblical account, while the elders were sometimes present for parts of the covenant ceremony, they were instructed to worship from afar, whereas Moses alone was called to ascend the mountain to receive the stone tablets inscribed by God.132

It is important to note that biblical scholarship identifies multiple sources and traditions woven into these accounts, which sometimes present varying details regarding who was permitted to approach the divine presence.23