Iliad 19, with its talking horses. The book seems to be about the vulnerability of the human body: the living vulnerable to hunger (Achilles), the dead vulnerable to rot (Patroclus). Notable that both A & P are given ambrosia (by Athena and Thetis respectively) to deliver them from these ills…. This vulnerability is distinct from the armor of Hephaestus which bookends 19: Achilles receiving it at the beginning and putting it on at the end.