Sahih Muslim 1448
صحيح مسلم#1448SahihThabit reported:They (the believers) asked Anas about the ring of the Messenger of Allah (ﷺ) and he said: One night the Messenger of Allah (ﷺ) delayed (observing) the 'Isya' prayer up to the midnight or midnight was about to be over. He then came and said: (Other) people have offered prayers and slept, but you are constantly in prayer as long as you wait for prayer. Anas said: I perceive as if I am seeing the lustre of his silver ring, and lifted his, small left finger (in order to show how the Prophet had lifted it)
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: 5:281