And thus shalt thou do unto Aaron, and to his sons, according to all things which I have commanded thee: seven days shalt thou consecrate them.
The ceremonies for consecrating Aaron and his sons had to be set down in detail so that they themselves would grasp the weight of what God called them to, and the people would learn to honor the office and keep their hands off it. The Hebrew word for consecrating means filling the hand, which tells us ministers have their hands full, no time for trifling, their work is so great and constant.
AI summary
Commenting on Exodus 29:1-37
Every single thing the Lord commanded had to be done; nothing could be left out. Seven days of consecration gave them time to grow accustomed to wearing the garments and offering sacrifices, so they would be thoroughly fitted for their office and one Sabbath would pass over them in the process.
AI summary
seven days shalt thou consecrate them--The renewal of these ceremonies on the return of every day in the seven, with the intervention of a Sabbath, was a wise preparatory arrangement, in order to afford a sufficient interval for calm and devout reflection (Heb 9:1; Heb 10:1).