《礼记·丧服小记》
下荡小功这种丧服，其腰经是用连根漂白的麻制成，其下垂部分要挽起来搭到腰纷上。
下殇小功，带，澡麻不绝本，诎而反以报之。
For the mourning clothes of the lower grade, the sackcloth around the waist is made of linen with the roots bleached, and the lower part should be tied up to the waist.