Thabit reported,

They asked Anas about the ring of the Messenger of Allah ﷺ. He said that the Messenger of Allah ﷺ once delayed the evening prayer until half the night had passed, or nearly half the night had gone by. Then he came and said, "The people have prayed and gone to sleep, but you have remained in prayer as long as you waited for the prayer."Anas said, "It is as though I can still see the gleam of his silver ring," and he raised the little finger of his left hand.

Muslim 1448

Sahih

و حدثني أبو بكر بن نافع العبدي حدثنا بهز بن أسد العمي حدثنا حماد بن سلمة

عن ثابت

أنهم سألوا أنسا عن خاتم رسول الله ﷺ فقال أخر رسول الله ﷺ العشاء ذات ليلة إلى شطر الليل أو كاد يذهب شطر الليل ثم جاء فقال إن الناس قد صلوا وناموا وإنكم لم تزالوا في صلاة ما انتظرتم الصلاة قال أنس كأني أنظر إلى وبيص خاتمه من فضة ورفع إصبعه اليسرى بالخنصر

مسلم 1448صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Mosques and places of prayer
Chapter
Evening prayer and its delay
Numbering
Darussalam 1448
Muslim 1448