Bible Verses About Priests: Lasted seven days

“You shall do so to Aaron, and to his sons, according to all that I have commanded you. You shall consecrate them seven days.

Every day you shall offer the bull of sin offering for atonement: and you shall cleanse the altar, when you make atonement for it; and you shall anoint it, to sanctify it.

Seven days you shall make atonement for the altar, and sanctify it: and the altar shall be most holy; whatever touches the altar shall be holy.

You shall not go out from the door of the Tent of Meeting seven days, until the days of your consecration are fulfilled: for he shall consecrate you seven days.