《辽史·本纪·卷一》
三月初二，攻幽州，节度使周德威率幽、并、镇、定、魏五州兵马拒战于居庸关之西，会战于新州城东，大破之，斩首三万余级，杀李嗣恩之子武八。
三月辛亥，攻幽州，节度使周德威以幽、并、镇、定、魏五州之兵拒于居庸关之西，合战于新州东，大破之，斩首三万馀级。杀李嗣本之子武八。
On March 3, Youzhou was attacked. Jiedushi Zhou Dewen commanded the troops of Youzhou, Bingzhou, Zhenzhou, Dingzhou, and Weizhou to fight back in the west of Juyong Pass. They encountered the enemy and fought in the east of Xinzhou. The enemy was defeated. Over 30 thousand heads were cut off. Li Si'en's son, Wu Ba, was killed.