Jerome : (Ver. 30.) And the firstborn of the poor will be fed, and the poor will rest confidently. When the ruler strikes you, and the flying dragon devastates your boundaries, you will not plot against Judah, and you will not frighten my humble people with your deceit; but crushed by your own troubles, you will weep for your calamity. But the humble and poor, who did not trust in wealth and power, but in my name, will rest in secure peace and will not fear the attack of any enemy. And I will make your root perish in famine, and I will destroy your remnants. He is speaking entirely in figures. The meaning is that, while the people of God are confidently resting, the root of the Philistines will dry up, and all the remnants will be consumed. — Commentary on Isaiah Jerome : Moreover, those who have not broken the rod and yoke of their oppressor, but have submitted their neck to the Lord, and are poor in spirit, will be nourished, and will say: The Lord feeds me, and nothing will be lacking for me (Ps. 122:1). And they will hear from the Lord: I will feed them in fertile pastures (Ezek. 34; John 10); and they will enter and leave, and will find pastures. And the poor will be nourished by Him who strikes them in order to correct them: and they will rest in peace, whether the shepherd is watchful, they will act confidently, and they will rest with Lazarus in the bosom of Abraham (Luke 16). But those who broke the yoke and the staff of their oppressor shall endure everlasting hunger, so that they may not be nourished by the word of God, but all their remnants shall perish, so that nothing may grow from the evil seed. — Commentary on Isaiah