《北齐书·列传·卷十五》
逭时皇上以怀州刺史平鉴等人所筑之城深入敌境，打算放弃掉。潘乐认为轵关十分重要，必须严防死守，就加意重新修固，增兵添将，自己还镇河阳。拜任司空。
时帝以怀州刺史平鉴等所筑城深入敌境，欲弃之，乐以轵关要害，必须防固，乃更修理，增置兵将，而还镇河阳，拜司空。
When the imperial court considered giving up the city of Huai Prefecture, built by the prefect Ping Jian and others, because it protruded deep into the enemy territory, Ban Le, however, believed that it was a strategically important stronghold that could not be abandoned. He then reinforced it with more soldiers and began to defend it himself. He was given the title Minister of Works.