Leviticus 8:33-35
You must not go outside the entrance to the Tent of Meeting for seven days, until the days of your ordination are complete; for it will take seven days to ordain you. / What has been done today has been commanded by the LORD in order to make atonement on your behalf. / You must remain at the entrance to the Tent of Meeting day and night for seven days and keep the LORD’s charge so that you will not die, for this is what I have been commanded.”

Exodus 29:35-37
This is what you are to do for Aaron and his sons based on all that I have commanded you, taking seven days to ordain them. / Sacrifice a bull as a sin offering each day for atonement. Purify the altar by making atonement for it, and anoint it to consecrate it. / For seven days you shall make atonement for the altar and consecrate it. Then the altar will become most holy; whatever touches the altar will be holy.

Hebrews 10:10-14
And by that will, we have been sanctified through the sacrifice of the body of Jesus Christ once for all. / Day after day every priest stands to minister and to offer again and again the same sacrifices, which can never take away sins. / But when this Priest had offered for all time one sacrifice for sins, He sat down at the right hand of God. ...

Leviticus 16:30
because on this day atonement will be made for you to cleanse you, and you will be clean from all your sins before the LORD.

Hebrews 9:13-14
For if the blood of goats and bulls and the ashes of a heifer sprinkled on those who are ceremonially unclean sanctify them so that their bodies are clean, / how much more will the blood of Christ, who through the eternal Spirit offered Himself unblemished to God, purify our consciences from works of death, so that we may serve the living God!

Leviticus 9:1-4
On the eighth day Moses summoned Aaron and his sons and the elders of Israel. / He said to Aaron, “Take for yourself a young bull for a sin offering and a ram for a burnt offering, both without blemish, and present them before the LORD. / Then speak to the Israelites and say, ‘Take a male goat for a sin offering, a calf and a lamb—both a year old and without blemish—for a burnt offering, ...

Numbers 7:10-11
When the altar was anointed, the leaders approached with their offerings for its dedication and presented them before the altar. / And the LORD said to Moses, “Each day one leader is to present his offering for the dedication of the altar.”

2 Chronicles 7:8-9
So at that time Solomon and all Israel with him—a very great assembly of people from Lebo-hamath to the Brook of Egypt—kept the feast for seven days. / On the eighth day they held a solemn assembly, for the dedication of the altar had lasted seven days, and the feast seven days more.

Hebrews 7:27
Unlike the other high priests, He does not need to offer daily sacrifices, first for His own sins and then for the sins of the people; He sacrificed for sin once for all when He offered up Himself.

Leviticus 14:8-10
The one being cleansed must wash his clothes, shave off all his hair, and bathe with water; then he will be ceremonially clean. Afterward, he may enter the camp, but he must remain outside his tent for seven days. / On the seventh day he must shave off all his hair—his head, his beard, his eyebrows, and the rest of his hair. He must wash his clothes and bathe himself with water, and he will be clean. / On the eighth day he is to bring two unblemished male lambs, an unblemished ewe lamb a year old, a grain offering of three-tenths of an ephah of fine flour mixed with olive oil, and one log of olive oil.

1 Kings 8:65-66
So at that time Solomon and all Israel with him—a great assembly of people from Lebo-hamath to the Brook of Egypt—kept the feast before the LORD our God for seven days and seven more days—fourteen days in all. / On the fifteenth day Solomon sent the people away. So they blessed the king and went home, joyful and glad in heart for all the good things that the LORD had done for His servant David and for His people Israel.

Hebrews 10:1-4
For the law is only a shadow of the good things to come, not the realities themselves. It can never, by the same sacrifices offered year after year, make perfect those who draw near to worship. / If it could, would not the offerings have ceased? For the worshipers would have been cleansed once for all, and would no longer have felt the guilt of their sins. / Instead, those sacrifices are an annual reminder of sins, ...

Leviticus 12:6-8
When the days of her purification are complete, whether for a son or for a daughter, she is to bring to the priest at the entrance to the Tent of Meeting a year-old lamb for a burnt offering and a young pigeon or a turtledove for a sin offering. / And the priest will present them before the LORD and make atonement for her; and she shall be ceremonially cleansed from her flow of blood. This is the law for a woman giving birth, whether to a male or to a female. / But if she cannot afford a lamb, she shall bring two turtledoves or two young pigeons, one for a burnt offering and the other for a sin offering. Then the priest will make atonement for her, and she will be clean.’”

Numbers 28:17-18
On the fifteenth day of this month, there shall be a feast; for seven days unleavened bread is to be eaten. / On the first day there is to be a sacred assembly; you must not do any regular work.

2 Chronicles 29:17
They began the consecration on the first day of the first month, and on the eighth day of the month they reached the portico of the LORD. For eight more days they consecrated the house of the LORD itself, finishing on the sixteenth day of the first month.