The Lord will kill the root of the Philistines with a famine. This famine will be so severe that it will wipe out the remaining Philistine survivors there.

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.

It is during a time of military and social unrest that Isaiah conveys God's judgment on the Philistines, emphasizing that their former power will be overturned.

It was his declaring, "I will," in opposition to God's will. And anytime you declare your will in opposition to God's will, that's sin. That's rebellion.

It conveys a message of hope for the oppressed and marginalized, while also serving as a warning of judgment for those who have been disobedient.

30 The poorest of the poor will find pasture, and the needy will lie down in safety. But your root I will destroy by famine; it will slay your survivors.

The idea is, that even the most poor and defenseless would be safe. Shall feed - That is, they shall be supplied with food; they shall feed safely as a flock ...

And the firstborn of the poor shall feed, and the needy shall lie down in safety; but I will kill thy root with famine, and thy remnant shall be slain. Continue ...

New International Version The poorest of the poor will find pasture, and the needy will lie down in safety. But your root I will destroy by famine; ...