The headword phrase (including the aorist indicative active, first person singular, of katadole/sxw) comes from Julian, Epistle 32 (p.40.9 Bidez-Cumont).
For a similar phrase, again in a philosophical context, see Plutarch, Moralia 503B (from the de Garrulitate), an anecdote about Aristotle wearied with the talk of an interlocutor. As in Julian's letter, the form is used by the interlocutor about his own speech and the effect it may have had on the philosopher (kathdole/sxhka/ sou, filo/sofe).
The Suda (following Timaeus' Platonic Lexicon) explains a similar locution (diateqrulhme/nos ta\ w)=ta) found in Plato Republic 358C with a form of katadole/sxw (kathdolesxhme/nos): see delta 782. In kappa 534 the construction with the genitive is given, and alpha 505 has a definition of the noun a)dolesxi/a. For the noun flu/aros, see phi 548.