History of the Peloponnesian War

About the same time also the Lacedaemonians, with their whole forces, came forth as far as Leuctra, in the confines of their own territory towards Lycaeum, under the conduct of Agis, the son of Archidamus, their king. No man knew against what place they intended the war; no, not the cities themselves out of which they were levied.

But when in the sacrifices which they made for their passage the tokens observed were unlucky, they went home again and sent word about to their confederates (being now the month Carneius) to prepare themselves, after the next feast of the new moon (kept by the Dorians), to be again upon their march.

The Argives, who set forth the twentysixth day of the month before Carneius, though they celebrated the same day, yet all the time they continued invading and wasting Epidauria.

And the Epidaurians called in their confederates to help them, whereof some excused themselves upon the quality of the month; and others came but to the confines of Epidauria and there stayed.