《新五代史·世家·南汉世家第五》
四年，楚人用水军进攻封州，封州兵在贺江被打败，刘龚害怕，用《周易》占卜，碰上《大有》卦，于是在境内大赦，改年号叫大有。
四年，楚人以舟师攻封州，封州兵败于贺江，惧，以《周易》筮之，遇《大有》，遂赦境内，改元曰大有。
In the fourth year, the people of Chu attacked Fengzhou using a naval force. The Fengzhou army was defeated at Hejiang River. Liu Gong was afraid, so he used the I Ching to tell fortunes, and happened upon the Da You hexagram. He then pardoned all criminals within the territory and changed the era name to Da You.