《资治通鉴·宋纪·宋纪三》
殿中将军垣护之写信给到彦之劝阻他，认为到彦之应派竺灵秀帮助朱之死守滑台，然后亲自统率军队进攻黄河以北，还说： 过去，曾有人连年攻战，损兵折将，粮草断绝，仍然奋勇出击，不肯轻易向后退却。
殿中将军垣护之以书谏之，以为宜使竺灵秀硃修之守滑台，自帅大军进拟河北，且曰： 昔人有连年攻战，失众乏粮，犹张胆争前，莫肯轻退。
General of the Imperial Guards, Yuan Huizhi wrote a letter to advise against Dao Yanzi's course of action; he believed that Dao Yanzi should send Zhu Lingxiu to help Zhuzhi defend Huatai Pass, and that he himself should personally command the army to attack north of the Yellow River; he also said: "In the past, there were those who waged war after war for many years, sacrificing many soldiers, losing many leaders, and running out of food supplies, and yet were still encouraged to charge out to battle without giving up."