《资治通鉴·唐纪·唐纪四十一》
密令部下将石头埋在李宝臣的境内，让阴阳先生说那里有帝王之气，李宝臣便掘得此石。
密令瘗宝臣境内，使望气者言彼有王气，宝臣掘而得之。
He ordered his subordinates to bury the stone in Li Baoshen's territory and ordered the diviner to say that there was dragon energy in that place. Li Baoshen dug up the stone.