《新唐书·列传·卷一百四十》
及至各部都归顺中国，思摩却留在颉利身边，与颉利同时被擒。太宗赏识他的忠心，委任他为右武侯大将军、化州都督，管辖颉利的旧部居于河南，改封怀化郡王。
及诸部纳款，思摩独留，与颉利俱禽，太宗以为忠，授右武候大将军、化州都督，统颉利故部居河南，徙怀化郡王。
When all the other tribes had submitted to China, Simo remained with Geli, and was captured at the same time. Taizong, appreciating his loyalty, appointed him General-in-Chief of the Right武侯, Inspector of Huazhou, in charge of Geli's former subordinates living in Henan, and re-enfeoffed him as Prince of Hua化郡.