The Messenger of Allah ﷺ used to say, "There is no god but Allah alone. He honored His army, granted victory to His servant, and defeated the confederates by Himself, so there is nothing after Him."
أن رسول الله ﷺ كان يقول: لا إله إلا الله وحده، أعز جنده، ونصر عبده، وغلب الأحزاب وحده، فلا شيء بعده.
Bukhari narrated it in the Book of Maghazi (4114), and Muslim in the Book of Dhikr and Dua (2724:77), both of them from Qutayba bin Saeed, who said, Layth narrated to us, from Saeed bin Abu Saeed, from his father (who is Abu Saeed Maqburi), from Abu Hurairah, who said, and then he mentioned it.