《后汉书·列传·宦者列传》
自古文字，大多刻在竹简上，然后编成册；那些用缣帛写字的人，把缣帛叫做纸。
自古书契多编以竹简，其用缣帛者谓之为纸。
Since ancient times, most writing was inscribed on bamboo slips, which were then bound into books; those who wrote on silk called the silk "paper".