[1] Likewise, according to Adler, in the Ambrosian Lexicon. The headword is perfect, first person singular, of du/w; very rare. Perhaps quoted from Menander (fr. 702 Koerte, now 476 Kassel-Austin), but only if Cobet's emendation (from the transmitted de/dwka, retained by K.-A.) is correct there.
[2] From the scholia to Homer, Iliad 5.811, where this third-person singular occurs.