Musnad Ahmad 2289

It was narrated from the cousin of your Prophet (ﷺ) - meaning Ibn 'Abbas (رضي الله عنه) - that the Prophet of Allah (ﷺ) used to recite this supplication at times of distress: “There is no God but Allah, the All Knowing, the Almighty; there is no God but Allah, Lord of the mighty Throne; there is no God but Allah, Lord of the seven heavens and Lord of the noble Throne.”