TSK · Leviticus 8:33

The priest who succeeds him from his sons, when he first comes to the tent of meeting to minister in the Holy Place, is to wear them for seven days.

The Seven Days of Purification“The one being cleansed must then wash his clothes, shave off all his hair, and bathe in water, and so be clean. Then afterward he may enter the camp, but he must live outside his tent seven days.

“For seven days you will provide every day a goat for a sin offering; a young bull and a ram from the flock, both without blemish, will be provided.