《新唐书·列传·卷一百四十》
默啜讨伐九姓，战于碛北，九姓败，人畜皆死，思结等部来降，皇帝都任他们为官。
默啜讨九姓，战碛北，九姓溃，人畜皆死，思结等部来降，帝悉官之。
Mochuo attacked the nine tribes, fighting in the north of Qibei, and the nine tribes were defeated. Everyone and their livestock died, and the troops under Sixijie and others surrendered, and the Emperor appointed them all as officials.