《太平广记·卷六·神仙六》
这时只有东方朔离开坐位写了一道奏章呈给武帝说： 我曾去过北极的镜火山，那里太阳月亮都照不到，只有龙口衔着灯烛照亮山的四极。
唯朔下席操笔疏曰： 臣游北极，至镜火山，日月所不照，有龙衔火，以照山四极。
At this time, only Dong Fangshuo left his seat and wrote a memorial to Emperor Wu, saying: "I once went to the Mirror Volcano in the North Pole, where the sun and moon could not shine, and only dragons held candles and lanterns to illuminate the four corners of the mountain."