The Phoenician Women (Greek: Φοίνισσαι) by Euripides is the longest surviving Greek tragedy in existence. Originally produced sometime between 412 BC and 408 BC, its retelling of the legendary struggle for the city of Thebes through the eyes of chorus of innocent Phoenician bystanders may reflect conditions in Athens at the end of the Peloponnesian War. The plot covers similar material to Aeschylus' Seven Against Thebes and gives accounts of the fates of Oedipus and Antigone that differ from those in Sophocles' Theban Plays.
Free online texts
Gutenberg: The Tragedies of Euripides, Vol I, translated by Theodore Alois Buckley (1892). Multiple formats.
Internet Archive: The Plays of Euripides, v.II: Andromache, Electra, The Bacchantes, Hecuba, Heracles Mad, The Phoenician Maidens, Orestes, Iphigenia among the Tauri, Iphigenia at Aulis, The Cyclops. English translation by E.P. Coleridge. Multiple formats.
Internet Classics Archive: The Phoenissae, translated by E.P. Coleridge. HTML and TXT formats.
Loebulus: L011N - Euripides -- Euripides III: Bacchanals. Madness of Hercules. Children of Hercules. Phoenician Maidens. Suppliants. Greek and English parallel text. Loeb edition, PDF format.
Poetry in Translation: Phoenician Women, translated by George Theodoridis. Multiple formats.
University of Adelaide (Internet Archive): The Phoenissae, translated by E.P. Coleridge. Multiple formats.
Wikisource: The Phoenician Maidens, English translation by Arthur S. Way. HTML and other formats.
History of Ancient Greece: Euripides at War, podcast by Ryan Stitt.
Wikipedia: The Phoenician Women.
The Great Conversation: Further reading at Tom's Learning Notes
Aeschylus: Seven Against Thebes.
Sophocles: The Theban Plays.
A.E. Haigh: The Tragic Drama of the Greeks (1896).
Ancient Greek resources: Learn to read Greek classics in the original.