《明史·列传·卷六十》
迤北可汗派使者入朝进贡，塑皇说： 应留使者数日，设宴慰劳并赏赐，对待也先的使者加倍丰厚。
迤北可汗遣使入贡，宁言： 宜留使数日，宴劳赐予，视也先使倍厚。
The Khagan in North Yidi sent a messenger to bring tributes to the imperial court. Suo, the prince, said, "We should keep the messenger for several days, hold a banquet to comfort and reward him, and give even more generous gifts to that messenger from Yesian."