《新唐书·列传·卷二十四》
碰巧大将军刘方讨伐林邑，杨素对文帝说林邑有很多珍宝财物，不是李纲这样廉正的人不能担任司马，于是任命李纲为代理行军司马。
会大将军刘方讨林邑，素言林邑多珍赀，非纲不可任，遂署行军司马。
It happened that the Grand General Liu Fang was waging an assault on Linyi. Yang Su told Emperor Wen that Linyi would have many valuable treasures. He said that there was no one but Li Gang who was upright enough to serve as a division commander. So, he appointed Li Gang as a substitute military division commander.