2 Kings 6:25
So there was a terrible famine in Samaria. The army surrounded the city for so long that a donkey's head sold for eighty shekels of silver. About a cup of dove's dung sold for five shekels of silver.
2 Kings 6:25, Readable English Bible (READ)
Note: Eighty shekels was about 2 pounds of silver; five shekels was about 2 ounces. Hebrew: a quarter of a cab.