《论衡·卷四·书虚篇》
夏王孔甲在东蓂山打猎，遇雨天色昏暗，走进一个老百姓家，主人正在生孩子。
夏後孔甲，田於东蓂山，天雨晦冥，入於民家，主人方乳。
King Kong Jia, the king of Xia, hunted in Dongyi Mountain and met a rainy day. It was dark, so he walked into a civilian's house, and the owner was having a baby.