《旧唐书·本纪·卷十七》
所以圣祖皇帝告诫后人，应以慈善节俭为做皇帝的基本要求，《易》、《礼》等书中所载的法则，写得清楚明白简略通俗。
故圣祖之诫，以慈俭为宝；大《易》明训，垂简易之文。
The Holy Ancestor Emperor exhorted future generations to take charity and frugality as the basic requirements for becoming emperor. The books "Yi" and "Li" contain rules that are written clearly, concisely, and popularly.