Musnad Ahmad 32:1513

'Abd al-Wahhab narrated to us, from Sa'id, from Qatadah, from Anas ibn Malik, from the Prophet, peace and blessings of Allah be upon him, that he said: "Hell will continue to have [people] cast into it, and it will say: 'Are there any more?' until the Lord of Might places His Foot into it. Then some of it will draw together to the rest, and it will say: 'Enough, enough, by Your Might and Your Generosity.' And there will continue to be surplus in Paradise until Allah creates for it a creation, and He will cause them to dwell in the surplus of Paradise."