"I heard him saying" - meaning the Prophet (ﷺ) - "while supplicating against the Ahzab: 'O Allah, Revealer of Book! Severe is reckoning! Rout the Ahzab and shake them.'"

There is something on this topic from Ibn Masu'd

This Hadith is Hasan Sahih.
Jami` at-Tirmidhi Book 23, Hadith 9
← Previous Hadith "The Messenger of Allah (ﷺ) positioned us during the night at Badr."

There is something on this topic from Abu Ayyub.

This Hadith is Gharib, we do not know of it except from this route. I asked Muhammad bin Isma'il about this Hadith, but he did not know it, and he said: "Muhammad bin Ishaq heard from 'Ikrimah." And when I saw him, he had a good opinion about Muhammad bin Humaid Ar-Razi, then he considered him weak later.

Jami` at-Tirmidhi Book 23, Hadith 8 Next Hadith → "The Messenger of Allah (ﷺ) entered Makkah, and his standard was white."

This Hadith is Gharib, we do know of it except as a narration of Yayha bin Adam from Sharik. He said: I asked Muhammad about this Hadith, but he did not know it except as a narration of Yahya bin Adam from Sharik, he said: "More than one narrator has narrated to us from Sharik from 'Ammar bin Abu Az-Zubair from Jabir: 'The Prophet (ﷺ) entered Makkah and he was wearing a black 'Imamah.'"

Muhammad said: "This is the Hadith."

Duhn is a branch of Bajilah (the tribe), and 'Ammar ad-Duhni (one of the narrators) is 'Ammar bin Mu'awiyah Ad-Duhni, and his kunyah is Abu Mu'awiyah, he is from Al-Kufah, and he is trustworthy according to the people of Hadith.

Jami` at-Tirmidhi Book 23, Hadith 10