2 Kings 18:27

But Rabshakeh said unto them, still with the object of influencing the people, Hath my master sent me to thy master and to thee to speak these words? Hath he not sent me to the men which sit on the wall, to cause them to bow in submission, that they may eat their own dung and drink their own piss with you, the intimation being that the city would soon reach this point of distress that the inhabitants would eventually resort to their own excrements for food.