《国语·晋语·优施教骊姬谮申生》
优施献计让骊姬在夜里哭着对献公说： 我听说申生为人很仁义而且势力很大，对百姓又很宽厚慈爱，这些都是有所用心的举动。
优施教骊姬夜半而泣谓公曰： 吾闻申生甚好仁而强，甚宽惠而慈于民，皆有所行之。
Youshi suggested that Li Ji should cry to Duke Xian at night and say: I heard that Shen Sheng is very benevolent and has a lot of power, and he is also very kind and loving to the people. These are all purposeful acts.