Anas bin Malik reported,

The Prophet ﷺ said, "Hell will continue to have people cast into it while it asks, 'Are there any more?' until the Lord of Glory places His foot upon it. Then it will draw its parts together and say, 'Enough, enough, by Your might and Your generosity!' As for Paradise, there will remain in it a surplus until Allah creates new beings to dwell in that surplus."

Azami 16523

Sahih

عن أنس بن مالك

عن النبي ﷺ أنه قال: لا تزال جهنم يلقى فيها وتقول: هل من مزيد؟ حتى يضع رب العزة فيها قدمه، فينزوي بعضها إلى بعض، وتقول: قط قط، بعزتك وكرمك، ولا يزال في الجنة فضل حتى ينشئ الله لها خلقا، فيسكنهم فضل الجنة.

الأعظمي 16523صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Description of Paradise and Hell and their inhabitants
Chapter
Description of Paradise and Hell together
Section
Vastness of Paradise and Hell
Numbering
Jami al-Kamil 16523 (2nd edition)
Azami 16523