鹬蚌相争，渔翁得利

词语解释

鹬蚌相争，渔翁得利[ yù bàng xiāng zhēng，yú wēng dé lì ]

⒈  比喻双方争利、互不相让，结果两败俱伤，反而使第三者得利。

英two dogs fight for a bone， and a third runs aways with it; Parties in a quarrel are both losers;