《旧唐书·列传·卷八十三》
兄弟俩交换凤翔和徐州两处节镇，他十天以内接连担任父亲和哥哥的职务。
兄弟交换岐、徐二镇，旬日间再践父兄之任。
The brothers exchanged the military towns of Fengxiang and Xuzhou. Within ten days, he succeeded his father and brother to hold official posts.