Leviticus 8:30-36

And Moses took some of the anointing oil and some of the blood that was on the altar and sprinkled it upon Aaron and upon his vestments, and also upon his sons and upon their vestments. Thus he consecrated Aaron and his vestments, and also his sons and their vestments. Moses said to Aaron and his sons: Boil the flesh at the entrance of the Tent of Meeting and eat it there with the bread that is in the basket of ordination--as I commanded: Aaron and his sons shall eat it; and what is left over of the flesh and the bread you shall consume in fire. You shall not go outside the entrance of the Tent of Meeting for seven days, until the day that your period of ordination is completed. For your ordination will require seven days. Everything done today, the Lord has commanded to be done [seven days], to make expiation for you. You shall remain at the entrance of the Tent of Meeting day and night for seven days, keeping the Lord's charge--that you may not die--for so I have been commanded. And Aaron and his sons did all the things that the Lord had commanded through Moses.