《旧唐书·列传·卷一百四十》
当时诸位王爷斗鸡赌博，各有胜负，王勃写了一篇游戏文字：《檄英王鸡文》。
诸王斗鸡，互有胜负，勃戏为《檄英王鸡文》。
At that time, many princes gambled on cock fights, with varied outcomes. Wang Bo wrote a challenging article: "Declaration to the Victorious Rooster of the Prince of Ying."