Idioms  - 鹬蚌相争，渔翁得利【yù bàng xiāng zhēng，yú wēng dé lì】

鹬蚌相争，渔翁得利: 比喻双方相争两败俱伤，使第三者从中获利。
"yu bang xiang zheng yu weng de li " :It refers to two opponents defeating each other,
thus benefitting a third party.

鹬蚌相争，渔翁得利[yù bàng xiāng zhēng，yú wēng dé lì]
When the snipe and the clam grapple, it's the fisherman who stands to benefit; two dogs strive for a bone, and a third runs away with it benefit; two dogs strive for a bone, and a third runs away with it.