History of the Peloponnesian War

The Lacedaemonians, though those of their faction in Argos sent for them, went not a long time after; yet at last they adjourned the exercises and came forth with intention of giving them aid. But hearing by the way at Tegea that the few were overcome, they could not be entreated by such as had escaped thence to go on, but returning, went on with the celebration of their exercises.

But afterwards, when there came ambassadors unto them, both from the Argives in the city, and from them that were driven out, there being present also their confederates, and much alleged on either side, they concluded at last that those in the city had done the wrong and decreed to go against Argos with their army;