《新唐书·列传·卷一百四十》
皇帝准备诏令王惠与他们共同指挥，宰相宋瞡、苏耮说 ：突骑施叛，葛逻禄攻之，这是夷狄自相残杀，其结果不论是大者伤还是小者灭，都对我有利。
帝将诏王惠与相经略，宰相臣璟、臣颋曰： 突骑施叛，葛逻禄攻之，此夷狄自相残，非朝廷出也。大者伤，小者灭，皆我之利。
The emperor prepared an edict to order Wang Hui to command with them. The prime minister Song Di, Su Qian said : The Tujue rebelled and then Geluolu attacked them, this is the Yi Di tribe killing each other, the result regardless of the big killing the small or the small killing the big, it is advantageous to me.