《宋史·列传·卷二百三十》
蔡确对王王圭说： 您任宰相时间这么长，一定能得到中书令的官职。 王王圭深信不疑。
确说王珪曰： 公久在相位，必得中书令。 珪信不疑。
Cai Bian said to Wang Anguo, "You've been prime minister for so long, you're bound to get promoted to Minister of the Secretariat". Wang Anguo believed him implicitly.