Lamentations 3:64

He adds here a conclusion; for he has hitherto been relating, as I have said, the evils which he suffered, and also the reproaches and unjust oppressions, in order that; he might have God propitious to him; for this is the way of conciliating favor when we are wrongfully dealt with; for it cannot be but that God will sustain our cause. He indeed testifies that he is ready to help the miserable; it is his own peculiar work to deliver captives from prison, to illuminate the blind, to succor the miserable and the oppressed. This is the reason, then, why the Prophet now confidently asks God to render to his enemies their reward, according to the work of their hands

Were any one to object, and say, that another rule is prescribed to us, even to pray for our enemies, even when they oppress us; the answer is this, that the faithful, when they prayed thus, did not bring any violent feelings of their own, but pure zeal, and rightly formed; for the Prophet here did not pray for evil indiscriminately on all, but on the reprobate, who were perpetually the enemies of God and of his Church. He might then with sincerity of heart have asked God to render to them their just reward. And whenever the saints broke forth thus against their enemies, and asked God to become an avenger, this principle must be ever borne in mind, that they did not indulge their own wishes, but were so guided by the Holy Spirit — that moderation was connected with that fervid zeal to which I have referred. The Prophet, then, as he speaks here of the Chaldeans, confidently asked God to destroy them, as we shall again presently see. We find also in the Psalms the same imprecations, especially on Babylon, — “Happy he who shall render to thee what thou hast brought on us, who shall dash thy children against a stone.” (Psalm 137:8, 9.) It follows, —