《旧唐书·列传·卷一百二十六》
前人的记述说： 不要认为是小恶就去作恶，不要认为是小善就不行善。 
前志曰： 勿以小恶而为之，勿以小善而不为。 
The records of the ancients say: Do not think that something is a minor evil and so do it, do not think that something is a minor good and so not do it.