Sahih Muslim 2073
صحيح مسلم#2073SahihAbbad b. Tamim Mazini heard his uncle, who was one of the Companions of the Messenger of Allah (ﷺ), as saying:The Messenger of Allah (ﷺ) went out one day in order to pray for rain. He turned his back towards people, supplicated before Allah, facing towards Qibla, and turned his mantle round and then observed two rak'ahs of prayer
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: 9:4