《资治通鉴·魏纪·魏纪四》
强大的敌人压境，荒远之地还没有臣服，陛下乘船远征，必然给敌人以可乘之机，事到临头才去忧虑，恐怕后悔都来不及了。
强寇在境，荒服未庭，陛下乘桴远征，必致闚，戚至而忧，悔之无及。
A powerful enemy is at our doorstep and the remote territories have yet to submit. If Your Majesty takes to the sea in a campaign, it will inevitably give our enemies an opportunity to exploit. If you wait until the last minute to worry, I fear it will be too late for regrets.