《史记·三十世家·齐太公世家》
昭公元年，晋文公在城濮大败楚军，召集诸侯在践土盟会，朝见周天子，天子让晋做诸侯的霸主。
昭公元年，晋文公败楚于城濮，而会诸侯践土，朝周，天子使晋称伯。
In the first year of Duke Zhao's reign, Duke Wen of Jin defeated the Chu army at Chengpu, convened an alliance meeting with vassal states at Jiantu and paid homage to the King of Zhou, who made Jin the overlord of vassal states.