《新唐书·列传·卷五》
梁王修筑苑囿三百里，修建宫室，架起复道，耗费资财巨万，出行有警戒，返回要清道，一不得志，就发病而死。
王筑苑三百里，治宫室，为复道，费财巨万，出警人跸，一不得意，遂发病死。
The King of Liang built a three-hundred-mile garden and constructed a palace and a multi-level road, spending huge amounts of money. There were guards when he went out, and the roads were cleared when he returned. When he was frustrated, he fell ill and died.