τὸ γὰρ βραχύ τι τοῦτο πᾶσαν ὑμῶν ἔχει τὴν βεβαίωσιν καὶ πεῖραν τῆς γνώμης → this trifle contains the whole seal and trial of your resolution
subs.
P. and V. κηφήν, Noise: P. βόμβος, ὁ. v. intrans. P. and V. βομβεῖν (Soph., Frag.), V. θωύσσειν. Repeat over and over: P. and V. ὑμνεῖν, θρυλεῖν.