Anas reported the Prophet (ﷺ) as saying, "Hell will continue to have people thrown into it and ask if there are any more[*] till the Lord of might puts down His foot on it and its parts are collected together. It will then say, `Enough, enough, by Thy might and generosity.' In paradise there will continue to be more room till God creates people for it and causes them to dwell in the extra space in paradise." *Quran; 1:30 (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَنَسٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: " لَا تَزَالُ جَهَنَّمَ يُلْقَى فِيهَا وَتَقُولُ: هَلْ مِنْ مَزِيدٍ؟ حَتَّى يَضَعَ رَبُّ العزَّةِ فِيهَا قدَمَه فينزَوي بَعْضُهَا إِلَى بَعْضٍ فَتَقُولُ: قَطْ قَطْ بِعِزَّتِكَ وَكَرَمِكَ وَلَا يَزَالُ فِي الْجَنَّةِ فَضْلٌ حَتَّى يُنْشِئَ اللَّهُ لَهَا خَلْقًا فَيُسْكِنُهُمْ فَضْلَ الْجَنَّةِ ". مُتَّفق عَلَيْهِ
sunnah.com