Sahih Muslim 4936
صحيح مسلم#4936SahihIt has been reported on the authority of Umm Haram daughter of Milhan (through another chain of transmitters). She said:One day the Messenger of Allah (ﷺ) slept (at a place) near me. He woke up smiling. She said: Messenger of Allah. what made thee laugh? He said: A people from my followers were presented to me. They were sailing on the surface of this green sea... (here follows the tradition that has gone before)
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: 33:231