Exodus 29:30

30 That of his sons, that shall be made bishop for him, shall use that cloak (for) seven days, and which son shall enter into the tabernacle of witnessing, that he minister in the saintuary. (He of his sons, who shall be made the High Priest after him, and shall enter into the Tabernacle of the Witnessing to minister in the sanctuary, shall wear those clothes for seven days.)

Exodus 29:30 Meaning and Commentary

Exodus 29:30

And that son that is priest in his stead
The Targum of Jonathan is,

``who shall rise after him of his sons, not of the Levites;''

for the high priest was to be of the family of Aaron, a descendant of his; it was not enough that he was of the tribe of Levi, but he must descend from Aaron, either in the line of Eleazar or of Ithamar:

shall put them on seven days;
the next successor was to wear the garments seven days running:

when he cometh into the tabernacle of the congregation to minister in
the holy place;
to offer sacrifice in the court of the tabernacle, on the altar of burnt offering, and to offer incense on the altar of incense, and to trim the lamps of the candlestick, and to put the shewbread on the table.

Exodus 29:30 In-Context

28 and they shall turn into the part of Aaron, and of his sons, by everlasting right, of the sons of Israel; for they be the first things, and the beginning/s of the peaceable sacrifices of them, which they offer to the Lord. (and they shall belong to Aaron, and to his sons, by an everlasting law, as a gift from the Israelites; for they be the first things, and the beginnings of their peace offerings, which they offer to the Lord.)

29 Forsooth the sons of Aaron shall have after him the holy cloth(es), which Aaron shall use, that they be anointed therein, and that their hands be (made) sacred. (And the holy clothes which Aaron shall wear, shall belong to his sons after him, and they shall be anointed, and consecrated, in them.)

30 That of his sons, that shall be made bishop for him, shall use that cloak (for) seven days, and which son shall enter into the tabernacle of witnessing, that he minister in the saintuary. (He of his sons, who shall be made the High Priest after him, and shall enter into the Tabernacle of the Witnessing to minister in the sanctuary, shall wear those clothes for seven days.)

31 And soothly thou shalt take the wether of hallowing, that is, the ram of consecration, and thou shalt seethe his flesh in the holy place,

32 which flesh Aaron and his sons shall eat, and they shall eat the loaves, that be in the basket, in the porch of the tabernacle of witnessing, (and Aaron and his sons shall eat the ram's flesh, and the loaves that be in the basket, at the entrance to the Tabernacle of the Witnessing.)