《旧唐书·本纪·卷十八》
去年暗中潜入朔川一带，大肆劫掠牛马；今春又偷偷袭击振武地区，逼近城池。
去岁潜入朔川，大掠牛马；今春掩袭振武，逼近城池。
Last year, he secretly infiltrated the Shuochuan region and plundered many horses and cattle; this spring, he launched a stealth attack against Zhenwu, approaching the city.