'Offices' in the Bible

And it shall come to pass, that every one that is left in thine house shall come and crouch to him for a piece of silver and a morsel of bread, and shall say, Put me, I pray thee, into one of the priests' offices, that I may eat a piece of bread.

And David distributed them, both Zadok of the sons of Eleazar, and Ahimelech of the sons of Ithamar, according to their offices in their service.

And the priests waited on their offices: the Levites also with instruments of musick of the LORD, which David the king had made to praise the LORD, because his mercy endureth for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood.

Also Jehoiada appointed the offices of the house of the LORD by the hand of the priests the Levites, whom David had distributed in the house of the LORD, to offer the burnt offerings of the LORD, as it is written in the law of Moses, with rejoicing and with singing, as it was ordained by David.

Remember me, O my God, concerning this, and wipe not out my good deeds that I have done for the house of my God, and for the offices thereof.