《资治通鉴·宋纪·宋纪三》
有时你的心里并没有某些愿望，一受外界引诱，你就立刻产生欲望，这是最容易招致祸端的，应该时刻提醒自己，极力克制。卫青对待士大夫礼貌谦恭，对小人也有恩惠；西门豹性情刚直急躁，常常佩带苇草；董安于性情宽容，做事缓慢，常常佩带弓弦，都是为了警告自己，矫正自己的性情，他们的美名一齐得到了后世的传颂。
此最弊事，宜念裁抑。卫表遇士大夫以礼，与小人有恩；西门、安于，矫性齐美；关羽、张飞，任偏同弊。
Sometimes you don't have certain desires in your heart, but once you are tempted by the outside world, you immediately desire it. This is the easiest way to cause trouble, and you should always remind yourself to try your best to restrain yourself. Wei Qing was polite and humble to the literati, and also grateful to the villains; Ximen Leopard had a strong and irritable temperament, and often wore reeds; Dong Anyu had a tolerant temperament and was slow in doing things, and often wore a bowstring, all in order to To warn myself, to correct my temperament, their reputations have been passed down together from generation to generation.