Leviticus 8:4
And Moses did as the LORD commanded him; and the assembly was gathered together unto the door of the tabernacle of the congregation. And Moses did as the LORD commanded him; and the assembly was gathered together unto the door of the tabernacle of the congregation.
Moses acted in direct obedience to the divine command when he gathered the assembly together at the door of the tabernacle of the congregation for Aaron's consecration. The event shows that Aaron's priestly office was bestowed by God and set apart through a sacred act of consecration rather than taken by human appointment. The high-priestly office consecrated on that occasion represented Christ as the great High Priest.