《太平广记·卷四十六·神仙四十六》
樵夫点头，就让取丹砂朱笔，书写一符，放在火上，烟还没有断绝，就有一个小僮立在面前。
樵者颔之。因命丹笔，书一符，置于火上，烟未绝，有一小竖立于前。
The woodcutter nodded, took a vermilion writing brush and wrote a magic symbol, which he then burned in the fire. Before the smoke had even dissipated, a small servant appeared before him.