Sahih Muslim 190
صحيح مسلم#190SahihIt is reporter on the authority of Abu Huraira that the Messenger of Allah (may peace and blessings be upon him) observed:There came the people of Yemen who are soft of hearts, tender in feelings: the belief is that of the Yemenites, the sagacity is that of the Yemenites and the summit of unbelief is towards the East
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: 1:97