Sahih Muslim 1091
صحيح مسلم#1091SahihA'isha reported that the Messenger of Allah (may peace he upon him) used to pronounce while bowing and prostrating himself:All Glorious, All Holy, Lord of the Angels and the Spirit
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 4:253