Charles Ellicott Commentary Leviticus 8:3

"and assemble thou all the congregation at the door of the tent of meeting." — Leviticus 8:3 (ASV)

And gather thou all the congregation together —Better, and gather all the assembly together. The same word is rightly rendered assembly in the Authorized Version in Leviticus 8:4. (See Leviticus 4:13.) That is, call together the assembly of the elders, the heads of the tribes, and the principal men who represented the people. This is confirmed by Leviticus 9:1, where it is distinctly said that Moses called Aaron and his sons, and the elders of Israel, and where these elders are called in the following verse the children of Israel, by virtue of their representing the children of Israel.

Unto the door of the tabernacle of the congregation. —Better, to the entrance of the tent of meeting, that is, its courtyard.