“For he established a testimony in Jacob, and appointed a law in Israel, which he commanded our fathers, that they should make them known to their children:”
King James Version (KJV)
78:5 Established - This is justly put in first place, as the chief of all his mercies. A testimony - His law, called a testimony, because it is a witness between God and men, declaring the duties which God expects from man, and the blessings which man may expect from God.