'Courses' in the Bible
And David distributeth them into courses: Of the sons of Levi: of Gershon, Kohath, and Merari.
And to the sons of Aaron are their courses: sons of Aaron are Nadab, and Abihu, Eleazar, and Ithamar,
For the courses of the gatekeepers: of the Korhites is Meshelemiah son of Kore, of the sons of Asaph;
According to these are the courses of the gatekeepers; to the heads of the mighty ones are charges over-against their brethren, to minister in the house of Jehovah,
These are the courses of the gatekeepers, of the sons of the Korhite, and of the sons of Merari.
And the sons of Israel, after their number, heads of the fathers, and princes of the thousands and of the hundreds, and their officers, those serving the king in any matter of the courses, that are coming in and going out month by month, throughout all months of the year -- are in each course twenty and four thousand.
And David assembleth all the heads of Israel, heads of the tribes, and heads of the courses who are serving the king, and heads of the thousands, and heads of the hundreds, and heads of all the substance and possessions of the king, and of his sons, with the officers and the mighty ones, even to every mighty one of valour -- unto Jerusalem.
and for the courses of the priests and of the Levites, and for all the work of the service of the house of Jehovah, and for all vessels of service of the house of Jehovah,
And lo, courses of the priests and of the Levites are for all the service of the house of God; and with thee in all work is every willing one with wisdom, for every service; and the heads and all the people are according to all thy words.'
And it cometh to pass, in the going out of the priests from the sanctuary -- for all the priests who are present have sanctified themselves, there is none to watch by courses,
And he establisheth, according to the ordinance of David his father, the courses of the priests over their service, and of the Levites over their charges, to praise and to minister over-against the priests, according to the matter of a day in its day, and the gatekeepers in their courses at gate and gate, for so is the command of David the man of God.
And the Levites and all Judah do according to all that Jehoiada the priest hath commanded, and take each his men going in on the sabbath, with those going out on the sabbath, for Jehoiada the priest hath not let away the courses.
And Hezekiah appointeth the courses of the priests, and of the Levites, by their courses, each according to his service, of the priests and of the Levites, for burnt-offering, and for peace-offerings, to minister, and to give thanks, and to give praise in the gates of the camps of Jehovah.
And by his hand are Eden, and Miniamin, and Jeshua, and Shemaiah, Amariah, and Shechaniah, in cities of the priests, faithfully to give to their brethren in courses, as the great so the small,
apart from their genealogy, to males from a son of three years and upward, to every one who hath gone in to the house of Jehovah, by the matter of a day in its day, for their service in their charges, according to their courses;
and the genealogy of the priests by the house of their fathers, and of the Levites, from a son of twenty years and upward, in their charges, in their courses;
and prepare, by the house of your fathers, according to your courses, by the writing of David king of Israel, and by the writing of Solomon his son,
And the service is prepared, and the priests stand on their station, and the Levites on their courses, according to the command of the king,
and they have established the priests in their divisions, and the Levites in their courses, over the service of God that is in Jerusalem, as it is written in the book of Moses.