Leviticus 8:31-33

31Moses said to Aaron and to his sons, ‘Cook the meat at the door of the Tent of Meeting. Eat the meat with the bread in the basket by the door of the Tent of Meeting.

32Burn the meat and bread that you do not eat.

33You must stay at the door of the Tent of Meeting for seven days. This will make you holy. You must stay for seven days to become holy.