《旧唐书·本纪·卷十》
灵昌太守许叔冀被贼人所攻打，救兵不到，便率众投奔睢阳城。
灵昌太守许叔冀为贼所攻，援兵不至，拔众投睢阳郡。
Xu Shuji, the Prefect of Lingchang County, came under attack from the rebels, but the reinforcements did not arrive, so he led his troops to take refuge in Suiyang City.