The Donning of the Priestly Garments (Exodus 28:41).
This donning is deliberately described before the description of the linen breeches. The latter were not to be seen as priestly garments, but as a necessity by what they achieved.
“And you shall put them on Aaron your brother, and on his sons with him, and you shall anoint them, and consecrate them (literally ‘fill their hand'), and sanctify them, that they may minister to me in the priest's office.”
The uniqueness of Moses is again here brought out. He is the one who under God is to establish the priesthood. They receive their commission from him. He is to clothe Aaron and his sons in the apparel that has been described, and is then to set them apart for the priesthood by anointing, consecrating and sanctifying them. This will be described in more detail in Exodus 28:29. But before then a small, but important, detail must be dealt with.