《旧唐书·本纪·卷二》
太宗知道他们的阴谋，于是放马在黄河北岸吃草来诱敌。
太宗知其谋，遂牧马河北以诱之。
In the morning, Jiande led all his troops to arrive, and deployed his army in the water of Simin. Shichong’s general, Guo Shiheng, set up an array in the south, which lasted for several miles. They shouted and roared, and all the generals were terrified.