《左传·哀公·哀公八年》
吴王又问公山不狃。公山不狃回答说： 鲁国平时虽然没有可靠的盟国，危急的时候却一定会有愿共同抵抗的援国。
王问于子洩，对曰： 鲁虽无与立，必有与毙。
The king of Wu asked Gongshan Buniu again. Gongshan Buniu answered: although the Lu country does not have a reliable ally country during normal times, during critical times there would definitely be an aid country willing to resist together.