(16) باب مَا ذَكَرَ النَّبِيُّ صلى الله عليه وسلم وَحَضَّ عَلَى اتِّفَاقِ أَهْلِ الْعِلْمِ
Narrated Anas:
The Prophet (ﷺ) brought the Ansar and the Quarish people into alliance in my house at Medina, and he invoked Allah for one month against the tribe of Bani Sulaim in (the last rak`a of each compulsory) prayer.
Reference: Sahih al-Bukhari 7340, 7341
In-book reference: Book 96, Hadith 69
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 92, Hadith 440