《容斋随笔·卷八·石砮》
按《晋书•挹娄传》记载：有石砮、楛矢，国内有座山出产的石头锋利得可刺入铁中；周武王时，挹娄族曾进贡矢、砮；魏元帝景元末年也来进贡。
案《晋书•挹娄传》： 有石砮、楛矢，国有山出石，其利入铁。周武王时，献其矢、砮。魏景元末亦来贡。
According to the Records of the Jin Dynasty: Records of Yilou, there were stone awls and mulberry arrows. There was a mountain in the country that produced stones that were sharp enough to pierce iron. During the reign of King Wu of Zhou, the Yilou people paid tribute with arrows and awls. They also came to pay tribute at the end of the Jingyuan period of Emperor Yuan of Wei.