ἀποφαντέον
From LSJ
τοῖς οἰκείοις βουλεύμασιν ἁλίσκεσθαι → hoist by one's own petard, hoist with one's own petard, hoist on one's own petard, hoisted by one's own petard, be hoist with one's own petard
English (LSJ)
A one must pronounce, Ph.2.461, Aristid. Quint.1.28, Plot.2.1.8.
Greek (Liddell-Scott)
ἀποφαντέον: ῥηματ. ἐπίθ., πρέπει τις νὰ ἐξενέγκῃ γνώμην, Φίλων, 2. 461.