Sahih Muslim 304
صحيح مسلم#304SahihIt is narrated on the authority of Thabit b. Dahhak that the Messenger of Allah (ﷺ) observed:He who took deliberately a false oath on a religion other than Islam would become that which he had professed. And he who killed himself with anything Allah would torment him with that in the Fire of Hell
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: 1:210