《新唐书·本纪·卷三·高宗》
初九，程和节与阿史那贺鲁的部属歌逻禄、沙陀突厥军在榆慕谷交战，击败敌军。
辛丑，程知节及贺鲁部歌逻禄、处月战于榆慕谷，败之。
On the 9th day of the first month, Cheng Hejie and Asina Huer's subordinates Geluo and the Shatuo Turkic army fought in the Yumugu Valley and defeated the enemy army.