ἐνεχυραστέον

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

Source

Spanish (DGE)

hay que aceptar en prenda Procop.Gaz.M.87.937A.