John Gill's Bible Commentary Ver. 3. And gather thou all the congregation together , etc.] That is, the heads of the tribes and the elders of the people, as Aben Ezra interprets it; for the whole body of the people, and every individual of them, could not be got together: unto the door of the tabernacle of the congregation ; taking this for the whole court itself, as it sometimes is; though no doubt on this occasion as great a number was convened as well could be admitted into the court, or about it, to be spectators and witnesses of the solemn investiture of Aaron and his sons with the priestly office.
Matthew Henry Commentary
Verses 1-13 - The consecration of Aaron and his sons had been delayed until the tabernacle had been prepared, and the laws of the sacrifices given Aaron and his sons were washed with water, to signify that they ough to purify themselves from all sinful dispositions, and ever after to keep themselves pure. Christ washes those from their sins in his ow blood whom he makes kings and priests to our God, Re 1:5, 6; and thos that draw near to God must be washed in pure water, Heb 10:22. The anointing of Aaron was to typify the anointing of Christ with the Spirit, which was not given by measure to him. All believers have received the anointing.
Original Hebrew ואת853 כל3605 העדה5712 הקהל6950 אל413 פתח6607 אהל168 מועד׃4150
