《资治通鉴·梁纪·梁纪十九》
侯景的军队之所以未敢进犯长江以北，实在是因为我们梁朝诸藩互为屏护，象磐石一样牢固，宗室的镇守强大而严密。
侯景之军所以未窥江外者，良为籓屏盘固，宗镇强密。
The reason why Hou Jing's army dared not invade north of the Yangtze River was because the Liang Dynasty's vassal states protected each other, which was as tough as a rock. The royal family guarded it with strength and strictness.