《资治通鉴·隋纪·隋纪七》
炀帝即位，尤为厌恶祖君彦的名声，按常规将祖君彦调选为东平郡的书佐，检校宿城令。
炀帝即位，尤疾其名，依常调选东平书佐，检校宿城令。
After Emperor Yang ascended to the throne, he was particularly disgusted by Zu Junyan’s reputation and, in accordance with the traditional way, summoned Zu Junyan to serve as an assistant magistrate of Dongping prefecture, and to inspect the prefecture of Sucheng.