And they taught in Judah,.... The people their duty to God and man: and had the book of the law of the Lord with them; as the rule of their instruction, and the people's obedience; out of this they taught them, and by it confirmed what they taught, and enforced it with the divine authority: and went about throughout all the cities of Judah; not only their own cities, the Levitical ones, but all others: and taught the people; the law of the Lord, the fear and worship of God.