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.
Related Commentaries of Psalms 78:5
Psalms 78:5
5 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: