The Prophet Sassam's Dua Against the People of Ahazab

The prophet sassam stood up obviously to make dua against the people of ahazab. 30 years later he's writing a letter to them and telling them in one of the battles that the process al-am fought they waited after the sun had set then he stood up. In another ahaddith we learned that Abdallah ibn abi ofa wrote to the sahaba who were fighting the hawadi.