אוּלָם֙ שְֽׁלַֽח־נָ֣א יָֽדְךָ֔ וְגַ֥ע אֶל־עַצְמ֖וֹ וְאֶל־בְּשָׂר֑וֹ אִם־לֹ֥א אֶל־פָּנֶ֖יךָ יְבָרֲכֶֽךָּ׃
Mas extiende ahora tu mano, y toca á su hueso y á su carne, y verás si no te blasfema en tu rostro.
Malbim on Job
However, were You to stretch out Your hand and touch his person, his very flesh; not just skin-deep but so severely that he becomes convinced that his condition is terminal, then he would surely curse You to Your face and damn Governance.
Rashi on Job
will he not Will You not see immediately that he will blaspheme You to Your face?