《资治通鉴·后梁纪·后梁纪六》
李建及为人忠诚壮节，得到的赏赐全部分给士卒，与士卒们同甘共苦，所以能够得到士卒们对他尽心尽力，只要他出去作战，一定会立功，同僚们很嫉妒他。
建及为人忠壮，所得赏赐，悉分士卒，与同甘苦，故能得其死力，所向立功；同列疾之。
Li Jianji was loyal and courageous. He distributed all the rewards he received to the soldiers and shared weal and woe with them, so he was able to get the soldiers to do their best. As long as he went out to fight, he would make great contributions, but his colleagues were jealous of him.