Leviticus 8:35-36

³⁵You must stay at the entrance of the Sacred Tent for seven days and seven nights and do what Yahweh requires, in order that you will not die because of disobeying him. I am telling you that because that is what Yahweh has commanded me to tell you.”

³⁶So Aaron and his sons did everything that Yahweh told Moses/me to tell them.