Prepare yourselves by families in your divisions, according to the instructions written by David king of Israel and Solomon his son.
KJV
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.
ASV
And prepare yourselves after your fathers’ houses by your courses, according to the writing of David king of Israel, and according to the writing of Solomon his son.