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והנה נער בוכה זה אהרן שהניחתו אצל התיבה. נער בכה. בגי'. זה אהרן הכהן: And behold! A youth was crying. This refers to Aharon, for his mother placed him near the wicker basket (Yalkut Shimoni, Parshas Shmos, 166). “A youth was crying” in gematria is equivalent to “this is Aharon HaKohen”.