Leviticus 8:1-5

And Jehovah spake unto Moses, saying, Take Aaron and his sons with him, and the garments, and the anointing oil, and the bullock of the sin-offering, and the two rams, and the basket of unleavened bread; and assemble thou all the congregation at the door of the tent of meeting. And Moses did as Jehovah commanded him; and the congregation was assembled at the door of the tent of meeting. And Moses said unto the congregation, This is the thing which Jehovah hath commanded to be done.