Charles H. Spurgeon on Psalms 89:34

My covenant will I not break. He had said above, If the children of David break my statutes; and now, alluding to that breach, he declares that he will not requite them as they requite him, My covenant will I not break, implying, that although his people may not altogether act in a manner corresponding to their vocation, as they ought to do, he will not suffer his covenant to be broken and disannulled on account of their fault, because he will promptly and effectually prevent this in the way of blotting out their sins by a gratuitous pardon. —John Calvin.