2 Chronicles 19:9 KJV
And he charged them, saying, Thus shall ye do in the fear of the Lord, faithfully, and with a perfect heart.
2 Chronicles 19:9, King James Version
In context
8 Moreover in Jerusalem did Jehoshaphat set of the Levites, and of the priests, and of the chief of the fathers of Israel, for the judgment of the Lord, and for controversies, when they returned to Jerusalem.
9 And he charged them, saying, Thus shall ye do in the fear of the Lord, faithfully, and with a perfect heart.
10 And what cause soever shall come to you of your brethren that dwell in their cities, between blood and blood, between law and commandment, statutes and judgments, ye shall even warn them that they trespass not against the Lord, and so wrath come upon you, and upon your brethren: this do, and ye shall not trespass.