It is narrated from Hazrat Ismail bin Khalid that I heard Abdullah bin Abi Awfa — he was among those companions who pledged allegiance under the tree — say that the Messenger of Allah, peace and blessings be upon him, supplicated against the armies and said: "O Allah! Revealer of the Book, Swift in reckoning, Defeater of the armies, O Allah! Defeat them and shake them."