《资治通鉴·唐纪·唐纪三十三》
癸巳，玄宗封苏毗王子悉诺逻为怀义王，赐姓名为李忠信。
癸巳，以苏毘王子悉诺逻为怀义王，赐姓名李忠信。
On Guisi day, Emperor Xuanzong conferred the Prince of Suibi, Xinulu, the title of Prince Huaiyi, and granted him the surname Li Zhongxin.