《新唐书·列传·卷三十二》
于是命令羲氏、和氏，尊崇天道，按照日月星辰的运行规律推算年月节令，认真地传授给百姓。 
乃命羲和，钦若昊天，历象日月星辰，敬授人时。 
They therefore ordered Xi Shi and He Shi to venerate the laws of Heaven, calculate the years, months, seasons and hours by the movements of the sun, moon and stars, and transmit them with great care to the people.