《战国策·齐三·孟尝君出行国至楚》
于是公孙戌往见孟尝君，说： 贤公准备接受楚人送您的象牙床吗？ 
入见孟尝君曰： 君岂受楚象床哉? 
So Gongsunxu went to see the Monarch Mengchang, saying: "My lord, are you ready to accept the ivory bed sent to you by the Chu people?"