Sahih Muslim 372
صحيح مسلم#372SahihIt is narrated on the authority of Abu Huraira that the Messenger of Allah (ﷺ) said:Islam initiated as something strange, and it would revert to its (old position) of being strange. so good tidings for the stranger
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: 1:279