Abu Saeed Khudri reported,

We prayed the night prayer with the Messenger of Allah ﷺ, but he did not come out until about half the night had passed. Then he said, "Take your places."So we took our places, and he said, "The people have prayed and gone to their beds, but you remain in prayer as long as you await the prayer. Were it not for the weakness of the weak and the illness of the sick, I would have delayed this prayer until the middle of the night."

Azami 1836

Sahih

عن أبي سعيد الخدري قال

صلينا مع رسول الله ﷺ صلاة العتمة، فلم يخرج حتى مضى نحو من شطر الليل فقال: خذوا مقاعدكم فأخذنا مقاعدنا، فقال: إن الناس قد صلوا وأخذوا مضاجعهم، وإنكم لن تزالوا في صلاة ما انتظرتم الصلاة، ولولا ضعف الضعيف، وسقم السقيم لأخرت هذه الصلاة إلى شطر الليل.

الأعظمي 1836صحيح
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 1836 (2nd edition)
Azami 1836