It is narrated by Abu Nadr that he learnt from a letter sent by a man from the Aslam tribe, who was a Companion of the Prophet (ﷺ) and whose name was 'Abdullah b. Abu Aufa, to 'Umar b. 'Ubaidullah when the latter marched upon Haruriyya (Khawarij) informing him that the Messenger of Allah (ﷺ) in one of those days when lie was confronting the enemy waited until the sun had declined. Then he stood up (to address the people) and said:O ye men, do not wish for an encounter with the enemy. Pray to Allah to grant you security; (but) when you (have to) encounter them exercise patience, and you should know that Paradise is under the shadows of the swords. Then the Messenger of Allah (ﷺ) stood up (again) and said: O Allah. Revealer of the Book, Disperser of the clouds, Defeater of the hordes, put our enemy to rout and help us against them

It is narrated on the authority of Ibn Abu Aufa that the Messenger of Allah (ﷺ) cursed the tribes (who had marched upon Medina with a combined force in 5 H) and said:O Allah, Revealer of the Book, swift in (taking) account, put the tribes to rout. O Lord, defeat them and shake them

This hadith has been transmitted on the authority of Ibn Abu Aufa with a slight variation of words

This hadith has been narrated on the authority of Ibn 'Uyaina through another chain of transmitters (who added the words)" the Disperser of clouds" in his narration