'Minister in the Sanctuary' in the Bible

and they have been on Aaron and on his sons, in their going in unto the tent of meeting, or in their drawing nigh unto the altar to minister in the sanctuary, and they do not bear iniquity nor have they died; a statute age-during to him, and to his seed after him.

seven days doth the priest in his stead (of his sons) put them on, when he goeth in unto the tent of meeting, to minister in the sanctuary.

And of the blue, and the purple, and the scarlet, they made coloured garments, to minister in the sanctuary; and they make the holy garments which are for Aaron, as Jehovah hath commanded Moses.

the coloured clothes to minister in the sanctuary, the holy garments for Aaron the priest, and the garments of his sons, to act as priest in.