《资治通鉴·梁纪·梁纪二十二》
侯安都关上大门，藏起旗帜，有意以此表示自己怯弱，同时告诫城中士兵： 凡登高窥探贼兵者一律处斩。 
侯安都闭门藏旗帜，示之以弱，令城中曰： 登陴窥贼者斩！ 
Hou Andu closed the gate and hid the flags, intentionally showing his cowardice, but at the same time, warned the soldiers in the city: Anyone on the watchtower who spies on the enemies will be executed.