Sahih Muslim 1806
صحيح مسلم#1806SahihA'isha reported that when the Messenger of Allah (ﷺ) stood up at night to pray, he began his prayer with two short rak'ahs
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: 6:234