Leviticus 8:33
You shall not go outside the doorway of the Tent of Meeting for seven days, until the days of your consecration (ordination) are ended; for it will take seven days to consecrate you.
Exodus 29:35
“So you shall do to Aaron and to his sons in accordance with all I have commanded you; during seven days you are to ordain them.
Exodus 29:30
That son who is [high] priest in his place shall put them on [each day for] seven days when he comes into the Tent of Meeting to minister in the Holy Place.
Leviticus 14:8
The one to be cleansed shall wash his clothes, shave off all his hair, and bathe in water; and he shall be clean. After that he may come into the camp, but he shall stay outside of his tent for seven days.
Numbers 19:12
That one shall purify himself from uncleanness with the water [made with the ashes of the burned heifer] on the third day and on the seventh day, and then he will be clean; but if he does not purify himself on the third day and on the seventh day, he will not be clean.
Ezekiel 43:25-27
For seven days you shall prepare daily a goat for a sin offering; also a young bull and a ram from the flock, without blemish, shall be prepared.