Sahih Bukhari Volume 009, Book 092, Hadith Number 445.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 92. Holding Fast to the Qur'an and Sunnah
Narrated By Ibn 'Umar : That he heard the Prophet, after raising his head from the bowing in morning prayer, saying, "O Allah, our Lord! All the praises are for you." And in the last (Rak'a) he said, "O Allah! Curse so-and-so and so-and-so." And then Allah revealed: 'Not for you (O Muhammad) is the decision, (but for Allah), whether He turns in mercy to them or punish them, for they are indeed wrongdoers.' (3.128)