Musnad Ahmad 30:3457

Yazid narrated to us, Hisham informed us, from Muhammad, from Abu Hurairah, from the Prophet, peace and blessings of Allah be upon him, who said: "Paradise and Hell disputed. Paradise said: 'O Lord, why is it that only the weak and the lowly of the people enter me?' And Hell said: 'O Lord, why is it that the tyrants and the arrogant enter me?' He said to Paradise: 'You are My mercy; I afflict with you whom I will.' And He said to Hell: 'You are My punishment; I afflict with you whom I will. And for each of you is its filling.' He said: As for Paradise, Allah, the Mighty and Majestic, does not wrong any of His creation, and He creates for it from His creation whom He wills. As for Hell, they are cast into it, and it says: 'Are there any more?' And they are cast into it, and it says: 'Are there any more?' until our Lord, the Mighty and Majestic, places His foot into it. Then it becomes filled, and its parts draw together, and it says: 'Enough, enough.'"