《史记·八书·历书》
月朔大余五十七日，小余五百四十三分；冬至大余二十四日，无小余；
大馀五十七，小馀五百四十三；大馀二十四，无小馀；
The first day of the month is more than 57 days, and it is less than 543 minutes; the winter solstice is more than 24 days, and there is no less;