And We refrain from sending the signs, only because the men of former generations treated them as false: We sent the she-camel to the Thamud to open their eyes, but they treated her wrongfully: We only send the Signs by way of terror (and warning from evil).

我不降示迹象，只为前人不承认它。我曾以母驼给赛莫德人做明证，但他们迫害（或虐待）它。我降迹象只是为了恫吓。