TgO Num20:10 :שְמַעוּ כְעַן סָרְבָנַיָא הֲמִן כֵיפָא הָדֵין נַפֵיק לְכוֹן מַיָא‏ : listen up now stubborn fellows [MT: הַמֹּרִים]: can water come out for you from this rock?
See the entire entry for sārḇān adj. obstinately rebellious