Which ancient Greek work says Pandora’s jar contains countless troubles for humanity?

Hesiod’s Works and Days says Pandora’s jar contains countless troubles for humanity.

The poem presents the story as part of an explanation for why human life includes toil, illness, and other hardships. Zeus has Pandora brought to Epimetheus, who accepts her despite Prometheus’s warning. When Pandora opens the vessel, the troubles inside spread through the world, while hope remains within.

Works and Days is a didactic poem traditionally attributed to Hesiod and usually dated to the late eighth or early seventh century BCE. Its subject is broader than mythology: it also discusses farming, justice, labor, seafaring, and practical advice.

Theogony, another poem attributed to Hesiod, mentions the creation of woman in a related divine conflict but does not provide the same full narrative of Pandora opening the vessel. This is why Works and Days is the principal ancient literary source for the familiar Pandora story.