《金史·列传·卷十五》
宗弼于是阻绝没有水的护城河，筑成通道，然后把炮排列在上面，就要发动攻击，城中人惧怕，于是投降。
乃绝隍筑道，列炮隍上，将攻之。城中人惧，遂降。
Zongbi then cut off the moat without water, built a passage, and then lined up the cannons on it, and was about to launch an attack. Those in the city were frightened and then surrendered.