《资治通鉴·汉纪·汉纪五十七》
如果他这样做，我甘宁的人头将代替他放入木盒。 
若尔，宁头当代入函。 
If he does so, I will place my head in the casket in his place.
<s>[INST] Render the following Classical Chinese text into fluent English: 若尔，宁头当代入函。  [/INST] If he does so, I will place my head in the casket in his place.</s>
Render the following Classical Chinese text into fluent English: 若尔，宁头当代入函。
user
If he does so, I will place my head in the casket in his place.
assistant