四分律比丘含注戒本 1.472

1.472

頭上毛，耳上毛，若脚上毛，若餘尨色毛也。欲作四十鉢羅臥具者，二十鉢羅黑，十鉢羅白，十鉢羅尨。乃至作二十鉢羅臥具，準上可知也。

Wool from the head, wool from the ears, or wool from the legs, or other mottled-colored wool. If one wishes to make a forty-pala rug, twenty palas are black, ten palas are white, and ten palas are mottled. Down to making a twenty-pala rug, it can be known by standardizing against the above.