《汉书·传·外戚传下》
旧例又有用公牛祭祀祖父母的事，戴侯、敬侯都承蒙圣恩得以用太牢礼祭祀，现在也应当按照旧制，愿陛下能够可怜我家！
又故事以特牛祠大父母，戴侯、敬侯皆得蒙恩以太牢祠，今当率如故事，唯陛下哀之！
According to tradition, a bull is used when sacrificing to one’s ancestors. Both Marquises Dai and Jing have been granted the privilege of offering the best sacrifices with the greatest of animals, so I ask that you show mercy on my family and allow me to do things according to the old system.