《周书·列传·卷四十七》
四年，高祖亲自率军东讨，至河阴而患疾病。
四年，高祖亲戎东讨，至河阴遇疾。
In the fourth year, Gaozu personally led the army to the east to attack. When he reached Heyin, he got sick.
<s>[INST] Transpose the following Modern Chinese text into Classical Chinese: 四年，高祖亲自率军东讨，至河阴而患疾病。 [/INST] 四年，高祖亲戎东讨，至河阴遇疾。</s>
Transpose the following Modern Chinese text into Classical Chinese: 四年，高祖亲自率军东讨，至河阴而患疾病。
user
四年，高祖亲戎东讨，至河阴遇疾。
assistant