Leviticus 8:33-37

And you shall not go outside the doorway of the tent of meeting for seven days, until the day that the period of your ordination is fulfilled; for he will ordain you through seven days.

The Lord has commanded us to do as has been done this day, to make atonement on your behalf.

At the doorway of the tent of meeting, moreover, you shall remain day and night for seven days and fulfill your duty to the Lord, so that you will not die; for so I have been commanded.”

Aaron and his sons did all the things which the Lord had commanded through Moses.