It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) recited Qunoot Nazilah after bowing in the Fajr prayer for a month, and he supplicated against the tribes of Ri'l, Dhakwan, 'Usayyah, and Banu Lihyan, who had disobeyed Allah and His Messenger.