Matthew Poole and continuators on Isaiah 14:19

19 But thou art cast out of thy grave , like an abominable branch : and as the raiment of those that are slain, thrust through with a sword, that go down to the stones of the pit , as a carcase trodden under feet .

Or, cast from thy grave or burying-place. Which very probably hapned to Belshazzar, who was slain in the Night, Dan. 5. 30. when his People had neither opportunity nor heart to bestow an honourable Interment upon him, and the Conquerours would not suffer them to do it.

Like an useless and rotten Twig of a Tree, which he that pruneth the Trees cutteth off, and casteth away with abhorrency, and suffers to lie rotting more and more upon the Ground: Or, like a degenerate Plant of a noble Vine, which is abominable.

Which, being cut and mangled, and besmeared with Mire, and defiled with Blood, was cast away with contempt, and abominated as an unclean thing, as it was in divers respects, in that Age and State of the Church.

Which Persons being slain, they, together with their Garments, are cast into some Pit. He saith, to the stones of the pit, either because such Bodies are commonly thrown into the next Pits, and Pits were frequently made by digging Stones out of their Quarries; or because there usually are a great number of Stones in the bottoms of Pits, either naturally, or being cast in thither upon divers occasions; and when dead Bodies are cast in thither, men use to throw an heap of Stones upon them.

Neglected, like such a Carcass. Or, this might literally happen to Belshazzar's dead Body, through Military Fury and Contempt, or from other Causes.