《资治通鉴·汉纪·汉纪五》
卜问凶吉，得到了 大横 的征兆，所得卜辞说： 横线直贯多强壮，我做天王，夏启的事业得到光大发扬。 
犹豫未定，卜之，兆得大横。占曰： 大横庚庚，余为天王，夏启以光。 
The divination revealed the sign of the "great cross" and the prophecy said: The cross-line traverses many that are robust. I will become the emperor and Xia Qi's achievements will be magnified and expanded.