《北史·列传·卷六十七》
宇文述一日之中七战，皆获胜利，既依恃骤然取得的胜利，内又为众议逼迫，于是就又进击，东渡了萨水，距平壤城三十里，依山安营扎寨。
述一日中七战皆捷，既恃骤胜，又内逼群议，遂进，东济萨水，去平壤城三十里，因山为营。
Yuwen Shu fought seven battles in one day, all of which he won. After relying on the sudden victory and being pressured by the arguments of the crowd, he attacked again, crossed the Sa River to the east, and camped thirty miles from Pyongyang City, relying on the mountain for protection.