Musnad Ahmad 30:2268

'Affan narrated to us, Hammad narrated to us, Thabit informed us, from Abu Rafi', from Abu Hurairah, from the Prophet (peace and blessings of Allah be upon him) — as Hammad reckons — that he said: "Whoever enters Paradise shall live in luxury and shall not suffer misery. His clothes shall not wear out, and his youth shall not fade. In Paradise, there is that which no eye has seen, no ear has heard, and has not occurred to the heart of any human."