《资治通鉴·唐纪·唐纪十二》
左庶子于志宁、右庶子孔颖达多次劝谏太子，太宗赞许他们，赐给二人金银财物以讽谕激励太子，并且改任于志宁为太子詹事。
左庶子于志宁、右庶子孔颖达数谏太子，上嘉之，赐二人金帛以风励太子，仍迁志宁为詹事。
Left shuzi Yu Zhinong and right shuzi Kong Yingda repeatedly advised the Prince, Taizong praised them, rewarded them with gold and silver in order to indirectly criticize and arouse the Prince, and also changed Yu Zhinong's position to Prince Zhan shi. 