《论衡·卷二十三·间时篇》
十二个月建月所用的寅、卯等十二辰，也就是十二时所用的寅、卯等十二辰。
十二月建寅卯，则十二月时所加寅卯也。
The twelve zodiac signs of the year, such as the tiger, the hare, etc., are the same as the twelve zodiac signs used in the twelve hours, such as the tiger, the hare, etc.