1 Chronicles 24:19 -

The order has been thus given of the twenty-four classes or courses of the priests. Each course served a week from the seventh day to the seventh ( 2 Kings 11:9 ; 2 Chronicles 23:8 ). An interesting allusion to this order of courses is tacitly made in Ezekiel 8:16-18 , where the twenty-fifth idolater may be supposed to be the high priest. Some have, on very insufficient grounds, supposed that this "ordering" of courses was not really the institution of David, but attributed to him after the Exile for the sake of the authority of his name. In Nehemiah 12:1-7 , moreover, the names do not appear as even twenty-four, but twenty-two—deficient by two!—a thing most easily to be accounted for. In addition to the direct scriptural witness on this subject, Josephus's ('Ant.,' Nehemiah 7:14 ) testimony confirms the account of our present chapter, while Movers and Dehler (in Herzog's 'R.E.,' 12:185) effectively combat the positions of De Wette and Gramberg, and of Herzberg, in his 'History of the People of Israel.'