He was himself, however, among the first condemned by the council, and came before the court for trial, where he was sentenced to a fine of fifty talents and delivered over to prison in default of payment.
Edition :
Plutarch Lives VII: Demosthenes and Cicero, Alexander and Caesar, Ed. Jeffrey Henderson, trans. Bernadotte Perrin (The Loeb Classical Library 99), Harvard University Press: Cambridge/MA - London 1967 (first ed. 1919).
Remark :
motive: Demosthenes was sentenced to paying a fine of 50 talents but could not afford. Instead, he was put into prison.