《资治通鉴·陈纪·陈纪二》
阳休之对常山王友王说： 过去周公早上读一百篇书，晚上会见七十个士，还恐怕做得不够。
休之谓王友王晞曰： 昔周公朝读百篇书，夕见七十士，犹恐不足。
Yang Xiu said to Wang You, the companion of the King of Changshan: "In the past, Duke Zhou would read a hundred books in the morning and meet seventy scholars in the evening, and he still felt that it was not enough."