Lamentations 3:65

He expresses what the vengeance was to be, even that God would give them up to a reprobate mind; for by מגנת-לב, meganet-leb, he no doubt meant the blindness of the heart, and at the same time included stupidity, as though he had said, “O Lord, so oppress them with evils, that they may become stupified.” For it is an extremity of evil, when we are so overpowered as not to be as it were ourselves, and when our evils do not drive us to prayer. (205)

We now then perceive what the Prophet meant by asking God to give to his enemies the impediment of heart, even that he might take away a sound mind, and smite them with blindness and madness, as it is said elsewhere. — I run on quickly, that I may finish, lest the hour should prevent us. The last verse of this triple alphabet follows, —

Give them blindness of heart:
Thy curse be to them.

— Ed