Leviticus 8:33-36

33Do not go outside the entrance to the tent of meeting for seven days, until the time your days of ordination are completed, because it will take seven days to ordain you.

34The Lord commanded what has been done today in order to make atonement for you.

35You must remain at the entrance to the tent of meeting day and night for seven days and keep the Lord’s charge so that you will not die, for this is what I was commanded.”

36So Aaron and his sons did everything the Lord had commanded through Moses.