αὐτοβοεί
From LSJ
καλῶς δρῶν ἐξαμαρτεῖν μᾶλλον ἢ νικᾶν κακῶς → I would prefer to fail with honor than to win by evil | I prefer to fail by acting rightly rather than win by acting wrongly | Better fail by doing right, than win by doing wrong (Sophocles, Philoctetes 95)
English (LSJ)
Adv.
A by a mere shout, at the first shout, αὐ. ἑλεῖν take without a blow, Th.2.81, 3.113, 8.62, etc.; αὐ. λαβεῖν κλέπτοντα, = ἐπ' αὐτοφώρῳ, AB 465.
German (Pape)
[Seite 396] beim ersten Kriegsgeschrei, auf der Stelle (E. M. παραχρῆμα), πόλιν ἑλεἰν, χειροῦσθαι, Thuc. 2, 81. 3, 113. 8, 62 u. Sp., z. B. Luc. Gymnas. 33; αὐτοβοεὶ λαβεῖν κλέπτοντα, auf frischer That den Dieb ertappen, B. A. 465.