Sahih Muslim 6740
صحيح مسلم#6740SahihAbu Huraira reported Allah's Messenger (ﷺ) as saying:Verily, a man would perform the deeds of the people of Paradise for a long time, then his deeds would be concluded with the deeds of the people of Hell. And verily, a man would perform the deeds of the people of Hell for a long time, and then his deeds would be concluded with the deeds of the people of Paradise
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: 46:18