《周书·列传·卷十七》
他的高祖叫俟力提，跟随魏太祖征讨，官至扬武将军、定阳侯。
高祖俟力提，从魏太祖征讨，位至扬武将军、定阳侯。
His great-grandfather was called Siliti, he followed Wei Taizu in the military campaigns, and became the general of Yangwu and dingyang Hou.