courses, &c.] Which David had ordained, 1 Chron. 23. 6. and 24. 1. Levites] To be helpfull to the Priests, Numbers 8:19. tents of the Lord] The Temple, to which they assembled as souldiers to their tents. Or, in allusion to the former house of God, which was a tent, or tabernacle, Exodus 35:11. The plurall number is used, in regard of the severall courts of the Temple.