For he not only rescued Phoebidas from punishment, but actually persuaded Sparta to assume responsibility for his iniquity and occupy the Cadmeia on its own account, besides putting the administration of Thebes into the hands of Archias and Leontidas, by whose aid Phoebidas had entered and seized the acropolis.
Edition :
Plutarch Lives V: Agesilaus and Pompey, Pelopidas and Marcellus, Ed. Jeffrey Henderson, trans. Bernadotte Perrin (The Loeb Classical Library 87), Harvard University Press: Cambridge/MA - London 1961 (first ed. 1917).
Remark :
motive: Phoebidas doesn't seize the Cadmeia on his own initiative. He enacts a plan of Agesilaus II. (Plut. Ages. 24.1). long-term consequence: See Plut. Ages. 23.7-24.1
