《战国策·赵四·秦攻魏取宁邑》
到了秦国，向秦王献上书傣说： 大王扩大土地到安邑，诸侯都来祝贺，敞国君王也私下赞许大王，不敢安闲住着，派臣下捧着礼物三次来到大王的宫廷，可是使者没能得到通报召见。
至秦，献书秦王曰： 大王广地宁邑，诸侯皆贺，敝邑寡君亦窃嘉之，不敢宁居，使下臣奉其币物三至王廷，而使不得通。
After arriving in Qin, he presented a letter to King of Qin, saying: Your majesty has expanded our territory to Anyi, the vassals have come to congratulate you. Our lord also praised you privately, and dared not dwell leisurely. He sent his minister to deliver the presents to your royal court for three times but our envoy was not able to receive the notice and summons.