Works and Days is the Hesiod poem that includes the detailed Greek story of Pandora and the jar.
Works and Days is a didactic poem concerned with farming, justice, labor, and the difficult conditions of human life. Its account of Pandora appears in a discussion of how suffering and toil entered the human world after the conflict involving Zeus and Prometheus.
The poem is traditionally attributed to Hesiod, who is generally placed in the late eighth or early seventh century BCE. It is written in dactylic hexameter, the same basic meter associated with several major Greek epic works. Unlike a purely heroic narrative, Works and Days repeatedly offers practical and moral instruction.
Theogony, another poem traditionally attributed to Hesiod, also mentions Pandora-related material, but Works and Days provides the fuller narrative of her creation, arrival, and the opening of the vessel. Ovid’s Metamorphoses is a Roman work from a much later period and is not the source of the earliest surviving detailed account.