For your reputation, for your religion, for your safety, for every advantage you have, do not acquit this man — no, exact vengeance upon him to make him an example to everyone, to our citizens and to the rest of the world.

[οὔτε γὰρ πρὸς δόξαν οὔτε πρὸς εὐσέβειαν οὔτε πρὸς ἀσφάλειαν οὔτε πρὸς ἄλλ᾿ οὐδὲν ὑμῖν συμφέρει τοῦτον ἀφεῖναι, ἀλλὰ τιμωρησαμένους παράδειγμα ποιῆσαι πᾶσι, καὶ τοῖς πολίταις καὶ τοῖς ἄλλοις Ἕλλησιν.]

Demosthenes (384-322 BC) Greek orator and statesman

Oration 19, “On the False Embassy,” sec. 343 (Conclusion)
    (Source)

Also known as "On the False Legation". Alt. trans.: "For the sake of your honor, of your religion, of your security, of everything you value, you must not acquit this man. Visit him with exemplary punishment, and let his fate be a warning not to our own citizens alone but to every man who lives in the Hellenic world." [tr. Vince, Vince (1926)]