Greece
Plutarch. "Γαμικὰ παραγγέλματα [Advice to Bride and Groom]." Ἠθικά Ethika [The Moralia]. c. 100 AD.
Plutarch. "Advice to Bride and Groom." Moralia, translated by Frank Cole Babbitt. Vol. 2, Harvard University Press, 1928.
Aeschylus. Ἑπτὰ ἐπὶ Θήβας [Seven Against Thebes]. c. 467 BC, Athens, Greece.
Aeschylus. "Seven Against Thebes." The Persians and Other Plays, edited and translated by Alan H. Sommerstein. Penguin Classics, 2010.
Aristotle. Ἠθικὰ Νικομάχεια, Ēthika Nikomacheia [Nicomachean Ethics]. c. 322 BC.
Aristotle. Nicomachean Ethics, translated by Terence Irwin. Hackett Publishing, 2019, bk. 1.
Plato. Νόμοι [Laws]. c. 346 BC, bk. 10.
Plato. Laws, translated by Tom Griffith, edited by Malcolm Schofield. Cambridge University Press, 2016, bk. 10.
Euripides. The Bacchae. 405 BC, l. 395.
Euripides. "The Baccae." Euripedes V: Bacchae, Iphigenia in Aulis, The Cyclops, Rhesus, translated by Richard Lattimore, et. al. University of Chicago Press, 2013, l. 395.
Aristotle. Ἠθικὰ Νικομάχεια, Ēthika Nikomacheia [Nicomachean Ethics]. c. 322 BC.
Aristotle. Nicomachean Ethics, translated by Terence Irwin. Hackett Publishing, 2019, bk. 2.
Plato. Ἀπολογία Σωκράτους [Apology of Socrates]. Speech of legal self-defence which Socrates spoke at his trial for impiety and corruption. 399 BC, Athens, Greece.
Plato. "Apology." Plato: Euthyphro; Apology; Crito; Phaedo, translated by Christopher Emlyn-Jones and William Preddy. Harvard University Press, 2017.
Plutarch. "Agesilaus." Βίοι Παράλληλοι [Parallel Lives]. c. 2nd century.
Plutarch. "Agesilaus." Roman Lives: A Selection of Eight Roman Lives, translated by Robin Waterfield. Oxford University Press, 2009.
Pyrrho. Quoted in Lives and Opinions of Eminent Philosophers, written by Diogenes Laertius. c. 240 AD, bk. 9, ch. 11, sect. 72.
Pyrrho. Quoted in The Lives of Eminent Philosophers, written by Diogenes Laërtius, translated by Pamela Mensch, edited by James Miller. Oxford University Press, 2018, bk 9, ch. 11, sect. 72.
Sophocles. Ἀντιγόνη [Antigone]. c. 441 BC, Festival of Dionysus, Athens, Greece.
Sophocles. "Antigone." The Oedipus Cycle: Oedipus Rex; Oedipus at Colonus; Antigone, translated by Dudley Fitts and Robert Fitzgerald. Mariner Books, 2002.
Aristotle. Politics. 4th century BC, bk. 4.
Aristotle. Politics, translated by R. F. Stalley and Sir Ernest Barker. Oxford University Press, 2009, bk. 4.
Aeschylus. Agamemnon. 458 BCE, The Dionysia, Athens, Greece.
Aeschylus. "Agamemnon." The Oresteia: Agamemnon; The Libation Bearers; The Eumenides, edited and translated by Robert Fagles. Penguin Classics, 1984.
Sophocles. Αἴας [Ajax]. c. 441 BCE, Athens, Greece.
Sophocles. "Ajax." Electra and Other Plays, translated by David Raeburn. Penguin Classics, 2008.
Aeschylus. Fragment 221. c. 450 BC.
Aeschylus. Fragments, translated by Alan H. Sommerstein. Harvard University Press, 2009, fragment 221.
Aristophanes. Λυσιστράτη [Lysistrata]. c. 411 BC, Athens, Greece.
Aristophanes. "Lysistrata." Lysistrata and Other Plays. Penguin Classics, 2008.
Euripides. Ἱππόλυτος [Hippolytus]. 428 BC, City Dionysia festival, Athens, Greece.
Euripides. "Hippolytus." Euripides I: Alcestis, Medea, The Children of Heracles, Hippolytus, edited and translated by Richard Lattimore, et. al. University of Chicago Press, 2013.
Pythagoras. Quoted in The Lives and Opinions of Eminent Philosophers, written by Diogenes Laërtius. c. 240 AD, bk. 8, ch. 1, sect. 10.
Pythagoras. Quoted in The Lives of Eminent Philosophers, written by Diogenes Laërtius, translated by Pamela Mensch, edited by James Miller. Oxford University Press, 2018, bk. 8, ch. 1, sect. 10.
Sophocles. Ἀντιγόνη [Antigone]. c. 441 BC, Festival of Dionysus, Athens, Greece.
Sophocles. "Antigone." The Oedipus Cycle: Oedipus Rex; Oedipus at Colonus; Antigone, translated by Dudley Fitts and Robert Fitzgerald. Mariner Books, 2002.
Quoted in Theaetetus, by Plato
Socrates. Quoted in Θεαίτητος [Theaetetus], written by Plato. c. 369 BC.
Socrates. Quoted in Theaetetus, written by Plato, translated by John McDowell. Oxford University Press, 2014.