'Ministry' in the Bible

and wrap the sashes around Aaron and his sons and put headbands on them, and so the ministry of priesthood will belong to them by a perpetual ordinance. Thus you are to consecrate Aaron and his sons.

They made specially woven garments for ministry in the sanctuary, and the holy garments for Aaron from the blue, purple, and scarlet yarn, just as the Lord had commanded Moses.

a bell and a pomegranate alternating all around the lower hem of the robe to be worn for ministry. They made it just as the Lord had commanded Moses.