Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1432
Abu Salama b. 'Abd al-Rahman is reported to have said that he had heard Abu Huraira saying: I would say prayer along with you which is near to the prayer of the Messenger of Allah (may peace be upon him). and Abu Huraira recited Qunut in the noon and in the 'Isya' and in the morning prayer, and invoked blessing (of Allah) upon Muslims-and curse upon the unbelievers.