Δημοσθένειος
From LSJ
ἄλογον δὴ τὸ μήτε μάχης ἄρξασθαι μήτε τοὺς φίλους φυλάξαι, ἐὰν ὑπό γε τῶν βαρβάρων ἀδικῆσθε → It is irrational neither to begin battle nor to guard the friends, if you are ever wronged by the foreigners
English (LSJ)
α, ον,
A Demosthenic, Longin.34.2:—also Δημοσθεν-ικός, ή, όν, D.H.Rh.11.10, Luc.Dem.Enc.15. Adv. -κῶς Aristid.Rh.1p.510S.