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.
The Eleans, being angry at their not determining to march against Lepreum, returned home; while the rest of the allies made preparations at Mantinea for proceeding against Tegea; and a party of the Tegeans themselves in the town were ready to give up the government to them.
As for the Lacedaemonians, when they had returned from Argos after concluding the four months' truce, they blamed Agis exceedingly for not having brought Argos into subjection to them, when there was so fine an opportunity as they thought had never before presented itself; for it was no easy thing to find so many and such allies collected together.
But when tidings also came of the capture of Orchomenus, they were far more enraged, and under the influence of anger resolved immediately (contrary to their general habit) that they ought to demolish his house, and fine him ten thousand drachmas.
But he besought them to do none of these things; for he would atone for his faults by good service when he next took the field, or they might then do to him whatever they pleased.
Accordingly, they abstained from the fine and the demolition of his house, but passed a law at that time which had never before existed amongst them; for they chose ten Spartans to act as counsellors with him, without whose consent he should have no power to lead an army out of the city.
Meanwhile intelligence reached them from their friends in Tegea, that unless they came there quickly, Tegea would go over from them to the Argives and their allies, and that it had all but done so.