《左传·庄公·庄公八年》
八年春天，周历正月，军队到达郎地，等待陈国人和蔡国人。
八年春，王正月，师次于郎，以俟陈人、蔡人。
In the spring of the eighth year, in the first month of the Zhou calendar, the army reached the Land of Lang, waiting for the people from the State of Chen and the State of Cai.