Sahih Muslim 966
صحيح مسلم#966SahihJabir b. Samura reported:The Messenger of Allah (ﷺ) said: The people who lift their eyes towards the sky in Prayer should avoid it or they would lose their eyesight
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: 4:128