Leviticus 8:33-36

You must not leave the Tabernacle entrance for seven days, for that is when the ordination ceremony will be completed. Everything we have done today was commanded by the LORD in order to purify you, making you right with him. Now stay at the entrance of the Tabernacle day and night for seven days, and do everything the LORD requires. If you fail to do this, you will die, for this is what the LORD has commanded.” So Aaron and his sons did everything the LORD had commanded through Moses.