《新唐书·列传·卷十七》
其部下埋怨，投包信于门说： 不早日降唐，父子诛灭。 
其下怨，投书于门曰： 不早附唐，父子诛。 
His subordinates complained, and wrote an anonymous letter to him: "If you do not surrender to Tang soon, you and your sons will all be killed."
<s>[INST] Translate the following Classical Chinese text into modern Chinese: 其下怨，投书于门曰： 不早附唐，父子诛。  [/INST] 其部下埋怨，投包信于门说： 不早日降唐，父子诛灭。 </s>
Translate the following Classical Chinese text into modern Chinese: 其下怨，投书于门曰： 不早附唐，父子诛。
user
其部下埋怨，投包信于门说： 不早日降唐，父子诛灭。
assistant