A special creature in heaven

What do scholars of hadith say in tafseer regarding a special creature mentioned in this hadith: > It was narrated from Anas ibn Maalik, from the Prophet (blessings and peace of Allah be upon him) that he said: “[People] will continue to be thrown into Hell, and it will say, ‘Are there any more to come?’ until the Lord of Glory places His foot in it, then its parts will be integrated with one another and it will say: Enough, enough, by Your glory and Your honour. And there will be extra space in Paradise until Allah creates another creation to live in the extra space of Paradise.” Narrated by al-Bukhaari (7384 ) and Muslim (2848 ).