Musnad Abu Ya'la al-Mawsili 160:33

And with his chain of narration from Abu Hurayrah—I think he attributed it to the Prophet (peace be upon him)—he said: "Whoever enters Paradise shall live in bliss and shall not suffer; 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 crossed the heart of any human."