'Ministering' in the Bible

Nevertheless, they are to serve in my sanctuary, overseeing the gates of the Temple, taking care of the Temple, slaughtering the burnt offerings and the sacrifices presented for the people, standing in the presence of the people, and ministering to them.

Whenever they enter at the gates of the inner court, they are to be clothed with linen garments. They are not to wear wool when they are ministering within the gates of the inner courtyard or in the Temple.

"When they enter the outer courtyard, that is, the outer courtyard where the people are, they are to take off their garments in which they were ministering, lay them in the consecrated chambers, and put on different garments so they will not transfer holiness to the people through their garments.