《北史·列传·卷八十七》
沙钵略派使者送信给隋文帝说 ：辰年九月十日，从天生大突厥天下贤圣天子伊利俱卢设莫何始波罗汗致信大隋皇帝：使者开府徐平和到达突厥，对我们讲了很多话，我们都听到了。
沙钵略遣使致书曰： 辰年九月十日，从天生大突厥天下贤圣天子伊利俱卢设莫何始波罗可汗致书大隋皇帝：使人开府徐平和至，辱告言语，具闻也。
Shaboli sent an envoy to deliver a letter to Emperor Wen of Sui, which read, "On the tenth day of the ninth month in the Year of the Dragon, the Great Holy Son of Heaven who established the Great Turkic Realm, Yili Julü Shemo Heqie Biboli Khan sends a letter to the Great Sui Emperor: Envoy and official of the princedom Xu Pinghe came to the Turkic Realm and spoke to us. We have heard everything he has said."