《汉书·纪·成帝纪》
七月二十八日，有关人员上言： 乘舆车、牛马、禽兽随葬都属非礼，不应随葬。 
乙未，有司言： 乘舆车、牛、马、禽兽皆非礼，不宜以葬。 
On the 28th of July, relevant personnel submitted a memorial, saying: It is against propriety to be buried with imperial carriages, oxen and horses, and birds and animals, and these should not be buried with the deceased.