Righteous; faithful or merciful, as that word is frequently used. Cut asunder the cords wherewith the plough was drawn; by which means they were stopped in their course. So he persists in the same metaphor of a plough. By these cords he understands all their plots and endeavours.
Related Commentaries of Psalms 129:4
Psalms 129:4
4 The LORD is righteous: he hath cut asunder the cords of the wicked.