《天工开物·上篇·乃服》
另外一种羊叫做 矞羊 ，唐代末期才从西域地区传入。这种羊外毛不是很长，内毛很细软，用来织绒毛布。陕西人把它叫做山羊，以此区别于绵羊。
一种羊唐末始自西域传来，外毛不甚蓑长，内毳细软，取织绒褐，秦人名曰山羊，以别于绵羊。
Another kind of sheep is called "矞羊", which was introduced from the western regions in the late Tang Dynasty. This kind of sheep has short hair on the outside and fine and soft hair on the inside, which is used to weave velvet. Shaanxi people call it "mountain goat" to distinguish it from sheep.