《资治通鉴·隋纪·隋纪二》
突厥突利可汗通过长孙晟上奏说都蓝可汗制造攻城器械，打算进攻大同城。
突厥突利可汗因长孙晟奏言都蓝可汗作攻具，欲攻大同城。
Tujue Tulishi Khan, through Changsun Sheng, reported that Duluo Khan manufactured siege weapons and intended to attack Datong City.