Despise not prophesyings (προφητειας μη εξουθενειτε). Same construction, stop counting as nothing (εξουθενεω, ουθεν=ουδεν), late form in LXX. Plutarch has εξουδενιζω. Plural form προφητειας (accusative). Word means

forth-telling (προ-φημ) rather than

fore-telling and is the chief of the spiritual gifts (1. Thessalonians 5:1) and evidently depreciated in Thessalonica as in Corinth later.