How Moses Was First in Priesthood Platform Sacrifice and Torah

Moses was first with the priesthood, with the platform (duchan), with the sacrifices, and with the Torah. [With the priesthood, in that he served in the high priesthood during the seven days of consecration (of Aaron and his sons).] With the platform, in that he set Eleazar upon the platform, as it is stated (in Numbers 3:32): "And the prince of the princes of the Levites was Eleazar..." And with the sacrifices: From where is this shown? (Leviticus 8:21): "And Moses turned the whole ram into smoke upon the altar." And with the Torah: From where is this shown? As it is stated (in Exodus 24:12): "Come up to Me to the mountain [and be there, and I will give you the stone tablets, and the Torah and the commandment, which I have written to instruct them]."