《后汉书·列传·郑孔荀列传》
曹操经常在外面征战，军国大事，都和荀彧商议。荀彧又向曹操推荐他的长于计谋的侄子荀攸，以及钟繇、郭嘉、陈群、杜袭、司马懿、戏志才等，都不辜负他的推荐。
操每征伐在外，其军国之事，皆与彧筹焉，彧又进操计谋之士从子攸，及钟繇、郭嘉、陈群、杜袭、司马懿、戏志才等，皆称其举。
Cao Cao often fights outside, and the state affairs are discussed with Xun Yu. Xun Yu also recommended to Cao Cao his strategist nephew Xun You, as well as Zhong Yao, Guo Jia, Chen Qun, Du Xi, Sima Yi, Xi Zhi Talent does not live up to his recommendation.