《旧唐书·本纪·卷十五》
三月十八日，皇上因为久旱不雨，亲自在宫禁中求雨，当夜，落下充足的雨水。
辛未，上以久旱，亲于禁中求雨，是夜，澍雨沾足。
On March 18, because there had been no rain for a long time, the emperor personally prayed for rain in the palace. When night fell, there was a heavy downpour.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 辛未，上以久旱，亲于禁中求雨，是夜，澍雨沾足。 [/INST] On March 18, because there had been no rain for a long time, the emperor personally prayed for rain in the palace. When night fell, there was a heavy downpour.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 辛未，上以久旱，亲于禁中求雨，是夜，澍雨沾足。
user
On March 18, because there had been no rain for a long time, the emperor personally prayed for rain in the palace. When night fell, there was a heavy downpour.
assistant