Which ancient Greek poem gives the fuller account of Pandora opening the jar?

Works and Days gives the fuller account of Pandora opening the jar.

Works and Days is a didactic poem attributed to Hesiod and usually dated to the late eighth or early seventh century BCE. It discusses farming, justice, work, seasonal timing, and the hardships of human life. The Pandora episode appears as part of an explanation for why people must labor and endure suffering.

The poem describes the gods creating Pandora, her arrival among humans, the container, and the escape of destructive forces. It also identifies hope as the one thing remaining inside after the lid is replaced. The Theogony, another Hesiodic poem, includes an earlier and shorter version but does not provide the same extended narrative.

The title is sometimes written in Greek as Erga kai Hemerai, meaning “Works and Days.” The Iliad and Odyssey are Homeric epics and do not supply the standard Pandora story. Confusing Works and Days with Theogony is understandable because both poems are associated with Hesiod.