《资治通鉴·后梁纪·后梁纪五》
壬戌，晋王从魏州去杨刘慰劳连队，他亲自划船到黄河上测量水的深浅，河水的深度只淹没了枪。
壬戌，晋王自魏州劳军于杨刘，自泛舟测河水，其深没枪。
On the 22nd day of the 9th month, King Jin went from Weizhou to Yang Liu to comfort the troops. He personally rowed a boat to the Yellow River to measure the depth of the water, and the depth of the water only submerged the gun.