《魏书·列传·卷二十九》
当时武兴氐王杨绍先的叔父杨集起反叛朝廷，皇帝令源怀任使持节、侍中、都督平氐诸军事，率兵进行征讨，所有兴废之事，由他见机行事全权处理。
时武兴氐王杨绍先叔集起反叛，诏怀使持节、侍中、都督平氐诸军事以讨之，须有兴废，任从权计。
At that time, Yang Ji, the uncle of Emperor Yang Shao of Wuxingdi, rebelled against the imperial court. The emperor ordered Yuan Huai to serve as the Minister of the Servant and the governor of all Pingdi military affairs, leading the troops to suppress the rebellion, and handled all the matters of rise and fall at his own discretion.