《资治通鉴·隋纪·隋纪四》
正逢天降大雨，杨谅打算率军退回，王劝道： 杨素孤军深入，人马疲惫，大王亲自率领精兵进攻杨素，必能将他打败。
会大雨，谅欲引军还，王頍谏曰： 杨素悬军深入，士马疲弊，王以锐卒自将击之，其势必克。
Coincidentally, it was heavily raining. Yang Liang planned to lead the army back, but Wang advised him, "Yang Su is deep in our territory and his men are weary. If Your Highness personally leads our elite forces to attack Yang Su, you can definitely defeat him.