30 And the firstborn of the poor shall feed, and the needy shall lie down in safety: and I will kill thy root with famine, and he shall slay thy remnant.
[AD 420] Jerome on Isaiah 14:30
(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.