Matthew Poole and continuators on Isaiah 14:30

30 And the first born of the poor shall feed , and the needy shall lie down in safety: and I will kill thy root with famin, and he shall slay thy remnant.

The People of the Jews, who are brought to extreme Poverty by thy Cruelty, and the Malice of other Enemies. The First-born were the chief of all the Children. Hence the Title of first-born is given to Persons or Things which are most eminent in their Kind, as to the People of Israel, Exod. 4. 22. to David, Psal. 89. 27. to a grievous Death, Iob 18. 13. and here to Persons eminently poor.

Shall have plenty of Provisions, in spight of all thine Attempts against them.

I will utterly destroy thee both Root and Branch, so that there shall not be a Remnant of thy People reserved, as it follows. It is a Metaphor from a Tree, which for want of Nourishment is dried up by the Roots.