verses 40-43
The official dress of the sons of Aaron, i.e., of the ordinary priests, was to consist of just the same articles as Aaron's priestly costume (Exo 28:39). But their body-coat is called weavers' work in Exo 39:27, and was therefore quite a plain cloth, of white byssus or cotton yarn, though it was whole throughout, ἀῤῥαφος without seam, like the robe of Christ (Joh 19:23). It was worn close to the body, and, according to Jewish tradition, reached down to the ankles (cf. Josephus, iii. 7, 2). The head-dress of an ordinary priest is called מגבּעה, related to גּביע a basin or cup, and therefore seems to have been in the form of an inverted cup, and to have been a plain white cotton cap. The girdle, according to Exo 39:29, was of the same material and work for Aaron and his sons. This dress was to be for glory and for beauty to the priests, just as Aaron's dress was to him (Exo 28:2). The glory consisted in the brilliant white colour, the symbol of holiness; whilst the girdle, which an oriental man puts on when preparing for the duties of an office, contained in the four colours of the sanctuary the indication that they were the officers of Jehovah in His earthly kingdom.
Verse 41
But since the clothing prescribed was an official dress, Moses was to put it upon Aaron and his sons, to anoint them and fill their hands, i.e., to invest them with the requisite sacrificial gifts (see at Lev 7:37), and so to sanctify them that they should be priests of Jehovah. For although the holiness of their office was reflected in their dress, it was necessary, on account of the sinfulness of their nature, that they should be sanctified through a special consecration for the administration of their office; and this consecration is prescribed in ch. 29 and carried out in Lev 8.
verses 42-43
The covering of their nakedness was an indispensable prerequisite. Aaron and his sons were therefore to receive מכנסים (from כּנס to cover or conceal, lit., concealers), short drawers, reaching from the hips to the thighs, and serving “to cover the flesh of the nakedness.” For this reason the directions concerning them are separated from those concerning the different portions of the dress, which were for glory and beauty. The material of which these drawers were to be made is called בּד. The meaning of this word is uncertain. According to Exo 39:28, it was made of twined byssus or cotton yarn; and the rendering of the lxx, λίνα or λίνεος (Lev 6:3), is not at variance with this, as the ancients not only apply the term λίνον, linum, to flax, but frequently use it for fine white cotton as well. In all probability bad was a kind of white cloth, from בּדד to be white or clean, primarily to separate.
Verse 43
These drawers the priests were to put on whenever they entered the sanctuary, that they might not “bear iniquity and die,” i.e., incur guilt deserving of death, either through disobedience to these instructions, or, what was still more important, through such violation of the reverence due to the holiness of the dwelling of God as they would be guilty of, if they entered the sanctuary with their nakedness uncovered. For as the consciousness of sin and guilt made itself known first
