《资治通鉴·唐纪·唐纪八十一》
壬辰，河东都押牙盖寓死，遗书劝李克用减少营建工程，减轻赋税，征求贤才。
壬辰，河东都押牙盖寓卒，遗书劝李克用省营缮，薄赋敛，求贤俊。
On Renchen day, Gai Yu, the governor of Hedong, died. Before he died, he wrote a letter admonishing Li Keyong to reduce construction projects, lower taxes, and seek virtuous men.