And thou shalt gird them with girdles (Aaron and his sons),
 &c.] Aaron with the girdle of the ephod, and with the girdle of needlework, and his sons with common girdles made for them; all which showed what strength, diligence, and expedition were necessary for the discharge of their office: 
 and put the bonnets on them;
 upon their heads, which differed only from the high priest's mitre in the manner of rolling or wrapping, as has been observed on ( Exodus 28:39 Exodus 28:40 ) : 
 and the priest's office shall be theirs for a perpetual statute;
 that is, shall descend from father to son in Aaron's family throughout all generations, until the Messiah should come; who would be a priest of another order, and put an end to the Aaronic priesthood, by fulfilling what that was a type of, and so abolishing it: 
 and thou shall consecrate Aaron and his sons;
 or "fill the hand of them"; that is, with sacrifices to offer for themselves and others, (See Gill on Exodus 28:41). The Targums of Onkelos and Jonathan are, 
``shall offer the offering of Aaron, and the offering of his sons,''of which there is an after account, and was one part of their consecration.