《新唐书·列传·卷六十四》
然后再任命建宁王为范阳节度大使，北边靠近边塞与李光弼形成掎角之势，以攻取范阳，贼寇一旦失去巢穴，必然会死在河南诸将的手中。 
徐命建宁王为范阳节度大使，北并塞与光弼相掎角，以取范阳。贼失巢窟，当死河南诸将手。 
Then appoint the Prince of Jianning as Fanyang's Jiedushi, and have him work with Li Guangbi to form a pincer movement from the north, close to the border, in order to capture Fanyang; once the rebels lose their den, they will certainly die at the hands of the generals of Henan.