《后汉书·本纪·孝安帝纪》
八月，护羌校尉马贤讨伐烧当羌于金城，战事不利。
八月，护羌校尉马贤讨烧当羌于金城，不利。
In August, the Captain of the Cavalry for the Protection of the Qiang, Ma Xian, defeated the Xingdang Qiang at Jincheng, but the battle was unfavorable.
<s>[INST] Convert the following modern Chinese text into Classical Chinese: 八月，护羌校尉马贤讨伐烧当羌于金城，战事不利。 [/INST] 八月，护羌校尉马贤讨烧当羌于金城，不利。</s>
Convert the following modern Chinese text into Classical Chinese: 八月，护羌校尉马贤讨伐烧当羌于金城，战事不利。
user
八月，护羌校尉马贤讨烧当羌于金城，不利。
assistant