《后汉书·列传·西羌传》
肃宗建初元年，安夷有位县吏抢了卑湳种羌人妇女为妻，这位妇女的丈夫杀死了县吏，安夷长宗延追赶他们追出边塞，同一部族的羌人害怕被杀，就一同杀死了宗延，并且与勒姐和吾良两个部族联合进犯边界。
肃宗建初元年，安夷县吏略妻卑湳种羌妇，吏为其夫所杀，安夷长宗延追之出塞，种人恐见诛，遂共杀延，而与勒姐及吾良二种相结为寇。
In the first year of Emperor Suzong's Jianchu, a county official in Anyi robbed and married a woman from the Binian tribe as his wife. The woman's husband killed the county official. Zong Yan of Anyi Chang chased them out of the border. The Qiang people of the same tribe were afraid of being killed and killed Zong Yan together, and they joined forces with the Lejie and Wuliang tribes to invade the border.