Sahih Al Bukhari Hadith Number 1003

Narrated Anas bin Malik: The Prophet (peace be upon him) recited Qunut for one month (in the Fajr prayer) asking Allah to punish the tribes of Ral and Dhakwan.

14  Witr Prayer
Hadith number 1003
Volume no 2
Chapter: 7 ( To recite Qunut before and after bowing)