釋氏稽古略 4.385

4.385

金國地勢日促。遂有南窺江漢之謀。搆怨於宋。數攻宋地而取之。是時西夏於金益懷貳心。以書來宋議夾攻金。八月宋安丙允夏謀（金志）。

As the territory of the Jin state grew daily more constricted, they subsequently harbored designs on the southern regions of the Jiang and Han, stirring up enmities with the Song and repeatedly attacking and seizing Song lands. At this time, Western Xia harbored increasingly divided loyalties toward the Jin and sent a letter to the Song proposing a pincer attack on the Jin. In the eighth month, An Bing of the Song agreed to the Xia plan (Record of Jin).