Myth Library · Birth And Divine Rivalry
Hera Delays the Birth of Heracles
1 source witness · 1 source-scoped variant · reviewed 2026-08-30
Hera turns Zeus' oath against the unborn Heracles by advancing Eurystheus' birth and holding the Eileithyiae away from Alcmene.
Canonical narrative
Zeus boasts before the gods that Eileithyia will bring into the light, on that very day, a man of his blood who will rule the people around him. Hera hears the opening inside the promise. She asks Zeus to swear that whoever of his lineage is born that day will indeed receive the rule. He swears, imagining Alcmene's child.
Hera leaves Olympus and goes to Argos, where the wife of Sthenelus carries a seven-month child. She brings Eurystheus forth before the months are complete. At the same time she stays Alcmene's labor and holds back the Eileithyiae. The poem shifts from singular Eileithyia in Zeus' announcement to plural childbirth powers in the act of restraint. Both forms matter to the story.
Hera returns to Zeus with the news that Eurystheus, another descendant of his line, has been born and now satisfies the oath. Heracles remains unborn and loses the promised kingship before seeing daylight. Zeus cannot revoke his word. Pain strikes him, and his rage falls upon Ate, whom he hurls from heaven. Eileithyia's part is not a decorative attendance at birth. Control over timing changes political power and shapes the laboring future of Heracles.
Episodes in this myth
Episode 1
Zeus swears over the day's birth
Zeus declares that a descendant born that day will rule and accepts the oath Hera demands.
Episode 2
Hera changes the birth order
Hera brings Eurystheus forth in the seventh month and holds the Eileithyiae away from Alcmene.
Episode 3
Eurystheus receives the rule
Hera announces the earlier birth, and Zeus discovers that his own oath has placed Eurystheus over the Argives.
Participants and roles
Hera
strategist who secures Zeus' oath, hastens Eurystheus, and holds childbirth powers away from Alcmene
Her intervention determines which descendant is born first and receives rule.Zeus
boaster whose sworn promise about the day's birth is turned against the child he expects
He learns of Eurystheus' birth only after the oath can no longer be recalled.Eileithyia and the Eileithyiae
childbirth power named singularly in Zeus' promise and plurally when Hera restrains Alcmene's labor
The shift from singular to plural is part of the poem's language and remains visible.Alcmene
woman whose labor with Heracles is held back while Hera advances another birth
The epic centers the political result without describing her experience at length.Heracles
unborn descendant expected by Zeus to receive rule but displaced when his birth is delayed
His later labors follow from a kingship lost before his birth.Eurystheus
seven-month child brought forth first and made ruler under the terms of Zeus' oath
Hera uses his descent from Zeus' lineage to satisfy the oath literally.Source-scoped variants
The Iliad's oath and altered birth order
Hera binds Zeus to his boast, advances Eurystheus' birth, and restrains Alcmene's delivery so Heracles loses the promised rule.
What differs: The poem explains Heracles' subordination through divine timing and preserves both singular Eileithyia and plural Eileithyiae in the episode.
Greek Archaic · Ancient GreeceSource witnesses
EXPLICIT PRIMARY · Reviewed
Iliad
Homer; Monro and Allen Greek edition with edition-specific translations · 1920
Book 19 · Line 95-133
The epic recounts Zeus' oath, Hera's manipulation of two births, Eurystheus' priority, and the resulting grief.
Open reviewed source