《太平广记·卷三百零八·神十八》
天平节度使马总，有一天公余时正在写信给远方的友人，当时有位术士程居在他身边。
马总为天平节度使。暇日方修远书，时术人程居在傍。
The Tianping Jiedushi, Ma Zong, was writing a letter to a distant friend in his spare time one day, when the practitioner Cheng Ju was at his side.