'Ministry' in the Bible

When the priest enters, they will not enter the outer court from the sanctuary without having removed their garments worn during their time of ministry, because they are holy. They will put on different clothes, and then they will approach the area reserved for the people."

“It [their ministry to Me] shall be as an inheritance to them, for I am their inheritance; and you shall give them no property (land) in Israel, for I am their possession.