《旧唐书·本纪·卷二十》
决定任命李克用暂署太师、中书令，晋封为晋王，食邑九千户，改赐 忠贞平难功臣 的尊号。
制以李克用守太师、中书令，进封晋王，食邑九千户，改赐 忠贞平难功臣。 
It was decided to appoint Li Keyong as acting Taishi and Minister of Zhongshu, and to give him the title of Prince of Jin, with an estate of 9,000 households, and to change the title to "Loyal and Unyielding Contributor to Peace."