History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
Now, therefore, that they had Oropus in their possession, the Eretrians came to Rhodes and invited the Peloponnesians to Euboea. They, however, were more intent upon relieving Chios, which was in distress; so they put off from Rhodes and sailed with all their ships.