Ezekiel 43:25
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.
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 29:35-37
“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.
Leviticus 8:35
You shall remain day and night for seven days at the doorway of the Tent of Meeting, doing what the Lord has required you to do, so that you will not die; for so I (Moses) have been commanded.”