Book 4
22.3
But Aristomenes' grief for the sack of Eira and his hatred of the Lacedaemonians suggested to him the following plan. He chose from the body of the Messenians five hundred men whom he knew to be the most unsparing of themselves, and asked them in the hearing of Aristocrates and the rest of the Arcadians if they were ready to die with him, avenging their country He did not know that Aristocrates was a traitor, for he thought that he had fled from the battle formerly from lack of courage and through cowardice, not for any knavery; so he asked the five hundred in his presence.
22.4
When they said that they were ready, he revealed the whole plan, that he proposed at all costs to lead them against Sparta during the following evening. For now was the time when the majority of the Lacedaemonians was away at Eira, and others were scouring Messenia for booty and plunder. “If we can capture and occupy Sparta,” said Aristomenes, “we can give back to the Lacedaemonians what is theirs and receive our own. If we fail, we shall die together, having done a deed for posterity to remember.”