《魏书·列传·卷三》
太祖担心内乱，就向北翻越阴山，前往贺兰部，派遣安同和长孙贺向慕容垂征集军队。
太祖虑内难，乃北逾阴山，幸贺兰部，遣安同及长孙贺徵兵于慕容垂。
Emperor Taizu was worried about internal strife, so he crossed the Yinshan Mountains to the north, went to the Helan tribe, and sent Andong and Changsun He to join forces with Murong Chui.