"Therefore you shall stay at the door of the Tabernacle of meeting day and night for seven days, and keep the charge [office] of of the Lord, so that you may not die; for so I have been commanded [by the LORD]." Lev. 8:35
This appears to be the kicking off of the priestly ministry. After this seven day period, on the 8th day, then the story picks back up again with Aaron and his sons beginning to offer sacrifices for the people.
The "7-day" period caught my attention, as it is the length of our calendar week, and then "day and night" meaning without ceasing. So all day, every day of the week is the charge or office of the Lord to be kept, so that you may not die (I came that you may have life. John 10:10).
No longer with the sacrifice of the blood of bulls and goats but with the sacrifice of a broken and contrite heart, and a life which manifests the fragrance of Christ (2 Cor. 2:15, Eph. 5:2).
Making the daily choice to consecrate ourselves to Him, to "present our members as instruments of righteousness to God," no longer as "instruments of unrighteousness to sin." (Rom. 6:13)
As Joshua said, "Sanctify [consecrate] yourselves, for tomorrow the LORD will do wonders among you." (3:5)
The greatest wonder being the mystery of the Gospel revealed to us, in us and through us - "Christ in us, the hope of glory." (Col. 1:27)