History of the Peloponnesian War
Thucydides
Thucydides. The history of the Peloponnesian War, Volume 1-2. Dale, Henry, translator. London: Heinemann and Henry G. Bohn, 1851-1852.
But the Athenian horse charged in return, and came to close quarters with them; and there was a cavalry action which lasted for a long time, in which both parties claim to have had the better.
For the Athenians, close under the walls of Nisaea, charged, killed, and stripped the Boeotian commander of the horse, and some few others; and having got possession of these bodies, restored them under truce, and elected a trophy: yet, regarding the action as a whole, neither party retired with a decided result, but the Boeotians drew off to their forces, and the Athenians to Nisaea.
After this, Brasidas and the army moved nearer to the sea and to Megara; and having chosen a convenient spot, drew up in order of battle, and remained still, thinking that the Athenians would advance against them, and knowing that the Megareans were waiting to see on which side would be the victory.