《资治通鉴·晋纪·晋纪三十九》
崤山以东的人民，认为国家本来居住在辽阔的大漠之上，以为国民和牲畜一定无数，因此，称作是 牛毛那样多 。
山东之人，以国家居广漠之地，谓其民畜无涯，号曰 牛毛之众 。
People east of Mount Xiao thought that the state had a vast territory and must have countless people and livestock, so they were called as numerous as cow’s hair.