וְהָיָ֣ה ׀ בַּיּ֣וֹם הַה֗וּא יֵבֹ֧שׁוּ הַנְּבִיאִ֛ים אִ֥ישׁ מֵחֶזְיֹנ֖וֹ בְּהִנָּֽבְאֹת֑וֹ וְלֹ֧א יִלְבְּשׁ֛וּ אַדֶּ֥רֶת שֵׂעָ֖ר לְמַ֥עַן כַּחֵֽשׁ׃
Y será en aquel tiempo, que todos los profetas se avergonzarán de su visión cuando profetizaren; ni nunca más se vestirán de manto velloso para mentir
Duties of the Heart
Among them: what is written "neither shall they wear a robe of coarse hair to deceive" (Zechariah 13:4), and this teaches that it was the attire of the early pious ones, and some of the other [non-pious] men of that generation would wear it to appear pious.