courses according to # 14_2CH_35_04 # And prepare [yourselves] by the houses of your fathers, after your courses, according to the writing of David king of Israel, and according to the writing of Solomon his son. 
courses according to # 14_2CH_35_10 # So the service was prepared, and the priests stood in their place, and the Levites in their courses, according to the king's commandment.