In Plato's Symposium, Porus was the personification of resourcefulness or expediency. He was seduced by Penia (poverty) while drunk on more than his fill of nectar at Aphrodite's birthday. Penia gave birth to Eros (love) from their union. Porus was the son of Metis. According to the character Diotima, Eros is forever in need because of his mother, but forever pursuing because of his father. 
- Flacelière, Robert (2008). A Literary History of Greece. pp. 275–276. ISBN 0202362957.
- Cooper, John M. (1997). Complete Works/Plato. Indianapolis, IN: Hackett Publishing Company. p. 486. ISBN 0-87220-349-2.
- Evola, Julius (1991). Eros and the Mysteries of Love. pp. 57–59. ISBN 0892813156.
- Morford, Mark (1999). Classical Mythology. Oxford University Press. pp. 133–134. ISBN 0195143388. Cite has empty unknown parameter:
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