Classical antiquity
Aurelius, Marcus. Meditations. c. 180, bk. 2.
Aurelius, Marcus. Meditations, edited and translated by Martin Hammond. Penguin Classics, 2015, bk. 2.
Carus, Titus Lucretius. De Rerum Natura [On the Nature of Things]. c. 55 BC, bk. 1, l. 268.
Carus, Titus Lucretius. The Nature of Things, translated by Alicia Stallings. Penguin Classics, 2007, bk. 1, l. 268.
Romulus. Quoted in Saturae [Satires], written by Horace. c. 35 BC, bk. 1.
Romulus. Quoted in Satires and Epistles, written by Horace, translated by John Davie. Oxford University Press, 2011, bk. 1.
The Holy Bible: The King James Version. 1611. (Judges 12:6).
Juvenal. Satirae [Satires]. c. 127, satire 1.
Juvenal. The Satires, translated by Niall Rudd. Oxford University Press, 2008, satire 1.
Sophocles. Αἴας [Ajax]. c. 441 BCE, Athens, Greece.
Sophocles. "Ajax." Electra and Other Plays, translated by David Raeburn. Penguin Classics, 2008.
Virgil. Georgica [Georgics]. c. 29 BCE, bk. 1.
Virgil. "The Georgics." The Eclogues and The Georgics, translated by C. Day Lewis. Oxford University Press, 2009, bk. 1.
Pliny the Elder. Historia Naturalis [Natural History]. 77 AD, bk. 7.
Pliny the Elder. Natural History: A Selection, translated by John F. Healy. Penguin Classics, 1991, bk. 7.
Aristotle. Φυσικὴ ἀκρόασις Phusike akroasis [Physics]. 4th century BC.
Aristotle. Physics, translated by Robin Waterfield. Oxford University Press, 2008.
Sophocles. Αἴας [Ajax]. c. 441 BCE, Athens, Greece.
Sophocles. "Ajax." Electra and Other Plays, translated by David Raeburn. Penguin Classics, 2008.
Carus, Titus Lucretius. De Rerum Natura [On the Nature of Things]. c. 55 BC, bk. 1, l. 1117.
Carus, Titus Lucretius. The Nature of Things, translated by Alicia Stallings. Penguin Classics, 2007, bk. 1, l. 1117.
Cicero, Marcus Tullius. Letter to Marcus Terentius Varro. c. 46 BC.
Cicero, Marcus Tullius. Letters to Friends, edited and translated by D. R. Shackleton Bailey. Vol. 2, Harvard University Press, 2001.
Hesiod. Θεογονία [Theogony]. c. 700 BC, l. 83.
Hesiod. "Theogony." Theogony and Works and Days, translated by M. L. West. Oxford University Press, 2009, l. 83.
Aristotle. Περὶ ποιητικῆς Peri poietikês [Poetics]. c. 335 BC.
Aristotle. Poetics, translated by James Hutton, edited by David Gorman and Michelle Zerba. W. W. Norton & Company, 2018.
Virgil. Georgica [Georgics]. c. 29 BCE, bk. 1.
Virgil. "The Georgics." The Eclogues and The Georgics, translated by C. Day Lewis. Oxford University Press, 2009, bk. 1.
Virgil. Georgica [Georgics]. c. 29 BCE, bk. 2.
Virgil. "The Georgics." The Eclogues and The Georgics, translated by C. Day Lewis. Oxford University Press, 2009, bk. 2.