ἀπιστητέον
From LSJ
μηδὲν κοτυλίζειν, ἀλλὰ καταπάττειν χύδην → not to sell by the cupful, but to dole out indiscriminately | not to sell by retail but wholesale
English (LSJ)
A one must mistrust, disbelieve, c. dat., Plb.4.41.8; of persons, Str.8.4.10, etc.; ἀ. ἡμῖν περί . . Hp.Cord.2.
Greek (Liddell-Scott)
ἀπιστητέον: ῥημ. ἐπίθ. τοῦ ἀπιστῶ, δεῖ ἀπιστεῖν, πρέπει τις νὰ ἀπιστῇ ἢ νὰ δυσπιστῇ, μετὰ δοτ., Πολύβ. 4. 41, 8, Στράβ. 362.
Spanish (DGE)
no hay que creer, hay que desconfiar c. dat. de cosa τῷ μεγέθει ... τῷ πλήθει Plb.4.41.8
•c. dat. de pers. ἡμῖν περί ... Hp.Cord.2, τῷ φήσαντι Str.8.4.10.