《左传·桓公·桓公十六年》
秋季七月，桓公进攻郑国回到国内，举行了祭告宗庙、大宴臣下的礼仪。
秋七月，公至自伐郑，以饮至之礼也。
In the autumn of the seventh month, Duke Huan returned home after attacking Zheng and held ceremonies to worship the ancestral temple and feast his ministers.