“For he established a Testimony in Iacob, and appointed a Law in Israel, which he commaunded our fathers: that they should make them knowen to their children.”
1611 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.