Anas bin Malik reported,

The Prophet ﷺ delayed the night prayer until midnight, then prayed and said, "The people have already prayed and gone to sleep, but you have been in prayer as long as you waited for it."In another narration, after he had prayed, he turned to us and said, "The people have prayed and gone to bed, but you have remained in prayer the whole time you were waiting for it."Anas said, "It is as if I can still see the gleam of his ring."

Azami 1830

Sahih

عن أنس بن مالك قال

أخر النبي صلاة العشاء إلى نصف الليل، ثم صلى ثم قال: قد صلى الناس وناموا، أما إنكم في صلاة ما انتظر تموها. وفي رواية: ثم أقبل علينا بوجهه بعد ما صلى فقال: صلى الناس ورقدوا، ولم تزالوا في صلاة منذ انتظر تموها قال (أنس): فكأني أنظر إلى وبيض خاتمه.

الأعظمي 1830صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Prayer
Chapter
Prayer times
Section
Isha prayer, its time and delaying it
Numbering
Jami al-Kamil 1830 (2nd edition)
Azami 1830