《资治通鉴·晋纪·晋纪二十一》
姚襄驻扎在历阳，考虑到前燕、前秦势力正强，所以没有北伐的念头，就沿淮河两岸广泛开垦屯田，训练勉励将士。
姚襄屯历阳，以燕、秦方强，未有北伐之志，乃夹淮广兴屯田，训厉将士。
Yao Xiang was stationed in Liyang. Considering that the power of Former Yan and Former Qin was strong, he had no intention of going north. He reclaimed farmland along the Huai River and trained the soldiers.