The Iliad 11.270–275

the piercing dart that the Eilithyiae, the goddesses of childbirth, send—even the daughters of Hera that have in their keeping bitter pangs; even so sharp pains came upon the mighty son of Atreus. Then he leapt upon his chariot and bade his charioteer drive to the hollow ships, for he was sore pained at heart. And he uttered a piercing shout, and called to the Danaans: My friends, leaders and rulers of the Argives, do ye now ward from the seafaring ships the grievous din of battle, for Zeus the counsellor suffereth me not to war the whole day through against the Trojans.