《晋书·列传·第六章》
等到卫瓘被楚王玮壁诬陷，子恆听到了风声，因为何劭是嫂子的父亲，就从墙洞中到他那裹，去打探消息。
及瓘为楚王玮所构，恆闻变，以何劭，嫂之父也，从墙孔中诣之，以问消息。
When Wei Guan was falsely accused by the King of Chu Wei, and Zi Heng heard the rumor, because He Shao was his sister-in-law's father, he went through a hole in the wall to his house, to find out the news.