Mukhtasar Bukhari

Narrated by Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) from the Noble Prophet (peace and blessings be upon him) that he (peace be upon him) used to supplicate in the last rak'ah of the Fajr prayer after bowing: "O Allah! Send curse upon so-and-so, and so-and-so, and so-and-so." At that time, Allah revealed this verse: "It is not for you (O Prophet) to decide; whether He turns in mercy to them or punishes them, for they are wrongdoers." (Surah Al-Imran: 128)