《资治通鉴·晋纪·晋纪二十六》
禁中录事席仂说： 以您心爱的儿子作为人质，再给他们奉赠贵重的宝物，以使他们的军队撤退，然后再从容计议，这是以屈求伸的办法。 
禁中录事席仂曰： 以爱子为质，赂以重宝，以退其师，然后徐为之计，此屈伸之术也。 
The Registrar of the Palace and Forbidden Precincts Xi Le said: "Use your beloved son as a hostage, and at the same time honor them with gifts, so that their army will withdraw, and then think about it at leisure - this is the method of seeking extension after bowing."