Sahih Muslim 6858
صحيح مسلم#6858SahihAl-Agharr al-Muzani, who was one amongst the Companions (of the Holy Prophet) reported that Allah's Messenger (ﷺ) said:There is (at times) some sort of shade upon my heart, and I seek forgiveness from Allah a hundred times a day
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: 48:52