To crush under his feet all the prisoners of the earth, To crush under his feet - He can neither gain credit nor pleasure in trampling upon those who are already bound, and in suffering; such he knows to be the state of man here below. From which it most assuredly follows, that God never afflicts us but for our good, nor chastises but that we may be partakers of his holiness.
All the prisoners of the earth - By the prisoners of the earth, or land, Dr. Blayney understands those insolvent debtors who were put in prison, and there obliged to work out the debt. Yet this is mercy in comparison with those who put them in prison, and keep them there, when they know that it is impossible, from the state of the laws, to lessen the debt by their confinement.
In Lamentations 3:34, Lamentations 3:35, and Lamentations 3:36, certain acts of tyranny, malice, and injustice are specified, which men often indulge themselves in the practice of towards one another, but which the Divine goodness is far from countenancing or approving by any similar conduct. - Blayney.