'Ministering' in the Bible

And it hath come to pass, in their going in unto the gates of the inner court, linen garments they put on; and no wool cometh up on them in their ministering in the gates of the inner court and within.

And in their going forth unto the outer court -- unto the outer court unto the people -- they strip off their garments, in which they are ministering, and have placed them in the holy chambers, and have put on other garments; and they do not sanctify the people in their own garments.