《史记·七十列传·淮南衡山列传》
元光六年，衡山王入京朝见，他的谒者卫庆懂方术，想上书请术事奉天子。衡山王很恼怒，故意告发卫庆犯下死罪，用严刑拷打逼他认可。
元光六年，衡山王入朝，其谒者卫庆有方术，欲上书事天子，王怒，故劾庆死罪，彊榜服之。
In 131 B.C., the Prince of Hengshan came to the capital to pay homage to the emperor. One of his attendants, Wei Qing, was a magician who wanted to perform magic and sacrifice for the emperor, but the Prince of Hengshan was annoyed and denounced Wei as a traitor. He put him in prison and tried to extort a false confession.