What does Isaiah 14:19 mean?
Some of the phrases in this passage are difficult to translate. Isaiah is using poetry and imagery, while also making a direct point. The overall message is clear: the fallen king of Babylon (Isaiah 14:12–15) will have no tomb or honorable burial in death. Unlike the kings he defeated and killed in life he will be cast out. This king of Babylon will not rest in the tomb that may have been reserved for him. His mutilated body may have been put on public display so that all could see that the hated and feared king had truly been killed (Isaiah 14:16–18).It is unclear what exactly Isaiah means by the king being cast away like a "loathed," or rejected, branch. The picture may be of a branch, pruned from the tree, which is cast off in a pile to be burned. It is possible that the king's body is cast into a pile of the bodies of others killed in the attack on Babylon. Like the rest of those bodies, his body will be trampled underfoot and cast into a pit, perhaps a mass grave.
In other words, the body of most powerful man in the world will be treated as common trash, once he is dead. People in the ancient Near East would have seen this as a terrible end. Many in this era believed that the quality of a person's afterlife was related to how and with what they were buried. Important kings and dignitaries were buried in lavish tombs fully equipped with sustenance for the beginning of a journey through the afterlife. Those unburied, or buried without dignity, were believed by some to return as unsettled spirits.
Again, Isaiah is not teaching any of these ideas as woodenly literal predictions. He is portraying the king's impending doom using the worst imaginable scenario in the minds of the people of the time. This king will have no relief from his utter humiliation in death.