Exodus 28:43

“And they shall be upon Aaron and upon his sons, etc.] Not the linen breeches only, but all the other garments: when they come into the tabernacle of the congregation; even into that part of it where the people assembled, the court of the tabernacle, and where stood the altar of burnt offering, on which they offered the sacrifices of the people, but never without the priestly garments on: or when they came near unto the altar to minister in the holy place; at the altar of incense which stood there; or when they came to trim the lamps of the candlestick, and set the shewbread on the table, and take away the old, which candlestick and shewbread table were both in the holy place, that they bear…”

“(Compare Exodus 39:1-31.) Moses is now commanded to commit all that pertains to the offerings made to the Lord in the sanctuary to the exclusive charge of the members of a single family, who were to hold their office from generation to generation. In the patriarchal times, the external rites of worship had generally been conducted by the head of the tribe or family, in accordance with the principle involved in the dedication of the firstborn Exodus 13:2; Numbers 3:12-13. Moses, as the divinely-appointed and acknowledged leader of the nation, had, on a special occasion, appointed those who were to offer sacrifice, and had himself sprinkled the consecrating blood of the victims on the people…”

“It shall be a statute for ever - That is, It is to continue as long as the priesthood continues. And it is to have its perpetuity in the substance, of which these things were the shadows. Next: Exodus Chapter 29”

“unto the altar: Exo 20:26 bear not iniquity: Lev 5:1, Lev 5:17, Lev 20:19, Lev 20:20, Lev 22:9; Num 9:13, Num 18:22; Mat 22:12, Mat 22:13 a statute: Exo 27:21; Lev 17:7 Next: Exodus Chapter 29”