《金史·列传·卷七十一》
皇上诏令思敬说 ：契丹贼如果战败必然从山后逃跑，可以选调新马三千匹，添加草料，以准备追袭。 
诏思敬曰： 契丹贼败必走山后，可选新马三千，加刍颣以备追袭。 
The emperor ordered Sijing: If the Khitan rebels are defeated, they will definitely flee from behind the mountain. You can select 3,000 new horses and add fodder to prepare for the pursuit.