Exodus 29:29-33

29“The holy garments of Aaron shall be for his sons after him, to be anointed and ordained in them.

30That son who is [high] priest in his place shall put them on [each day for] seven days when he comes into the Tent of Meeting to minister in the Holy Place.

31“You shall take the ram of the ordination and boil its meat in a holy place.

32Aaron and his sons shall eat the meat of the ram and the bread in the basket, at the doorway of the Tent of Meeting.

33They shall eat those things by which atonement was made at their ordination and consecration; but a layman shall not eat them, because they are holy [that is, set apart to the worship of God].