《汉书·志·律历志下》
昭公十八年距辛亥有一百三十一年，五月有丙子、戊寅、壬午，火星开始乱现，宋、卫、陈、郑有火灾。
十八年距辛亥百三十一岁，五月有丙子、戊寅、壬午，火始昏见，宋、卫、陈、郑火。
The 18th year of Duke Zhao's reign was 131 years since Xinhai, on which May had Jiazi, Wuchen, and Renwu, and Mars began to appear irregularly. Song, Wei, Chen, and Zheng suffered fires.