In which ancient Greek poem does Hesiod first describe Pandora as the first woman?

Hesiod first describes Pandora as the first woman in Works and Days.

Works and Days is an ancient Greek didactic poem traditionally attributed to Hesiod. It combines practical advice about farming and household life with reflections on justice, labor, and the difficult condition of humanity. The Pandora episode appears within that broader argument about why human life includes suffering and work.

In the poem, Zeus orders the creation of Pandora after Prometheus’s actions involving fire. The gods decorate and equip her, and she is sent to Epimetheus. Her opening of the sealed pithos provides the poem’s mythic explanation for the spread of troubles among humans.

Hesiod’s Theogony also refers to Pandora, but Works and Days contains the fuller narrative and the detail about what remains in the container. That difference makes the poem the standard primary source for questions about Pandora’s jar, Epimetheus, and the fate of hope.