Leviticus 8:33
And you must not go out from the entrance of the Meeting Tent for seven days, until the day when your days of ordination are completed, because you must be ordained over a seven-day period.
Exodus 29:35
"Thus you are to do for Aaron and for his sons, according to all that I have commanded you; you are to consecrate them for seven days.
Exodus 29:30
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.
Leviticus 14:8
"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.
Numbers 19:12
He must purify himself with water on the third day and on the seventh day, and so will be clean. But if he does not purify himself on the third day and the seventh day, then he will not be clean.
Ezekiel 43:25-27
"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.