《国语·周语·晋羊舌肸聘周论单靖公》
诗中说：昊天有成命，二后受之。成王不敢康，夙夜基命宥密。
其诗曰： 昊天有成命，二后受之，成王不敢康。
The poem says: ‘Descent from Heaven has its accomplished decrees, the two kings accept them. King Cheng did not dare to be at ease, morning and night the mandate was carried out closely.’