ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
ῥόθῐα (τά) 1 breakers met. ἀοιδᾶν ῥόθια δεκομένα κατερεῖς (sc. Αἴγινα) (Pae. 6.129)