מדרש על שמות 6:29

3) "… where I shall be appointed for you." (Vayikra 7:38): "… which the L–rd commanded Moses on the day that He charged him unto the children of Israel…" (Shemoth 34:35): "… until he came, [for the L–rd] to speak to 10 him." [(Shemoth 6:28): "… It was Moses and Aaron," immediately followed by] (Shemoth 6:29): "And it was on the day that the L–rd spoke to Moses in the land of Egypt." (Bamidbar 3:1): "And these are the generations of Aaron and Moses on the day that the L–rd spoke to Moses on Mount Sinai." (Vayikra 1:1): "And He called to Moses, and the L–rd spoke to him." — Aaron is excluded from all.