☉ 鹬蚌相争，渔翁得利 【yùbànɡxiānɡzhēnɡyúwēnɡdélì】
　　[ two dogs fight for a bone, and a third runs aways with it Parties in a quarrel are both losers ] 比喻双方争利、互不相让，结果两败俱伤，反而使第三者得利。