《三国志·蜀书·蒋琬费祎姜维传》
费祎经常坐在他们中间调解，向他们表明是非黑白，所以在诸葛亮还活着时，都能够发挥魏延，杨仪两人的长处，都是费祎补救的功劳。
祎常入其坐间，谏喻分别，终亮之世，各尽延、仪之用者，祎匡救之力也。
Fei Yi often sat between them to mediate and show them right and wrong, so while Zhuge Liang was alive, he was able to use the strengths of Wei Yan and Yang Yi, all thanks to Fei Yi's help.