From LSJ

Οὐ παύσεσθε, εἶπεν, ἡμῖν ὑπεζωσμένοις ξίφη νόμους ἀναγινώσκοντες; → What! will you never cease prating of laws to us that have swords by our sides? | Stop quoting the laws to us. We carry swords.

Source

Russian (Dvoretsky)

ὄ: interj. о! Arph.