Musnad Abu Ya'la al-Mawsili 160:131

'Abd al-A'la narrated to us, 'Abd al-'Aziz ibn Muhammad narrated to us, from al-'Ala', from his father, from Abu Hurayrah, that the Prophet (peace and blessings of Allah be upon him) said: "The world is the prison of the believer and the paradise of the disbeliever."