Musnad Ahmad 5:774

'Abdullah narrated to us, Zuhayr Abu Khaythama narrated to me, Abu Mu'awiyah narrated to us, 'Abd al-Rahman ibn Ishaq narrated to us, from 'Ali, may Allah be pleased with him, who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Indeed, in Paradise there is a market." He mentioned the hadith, except that he said: "So when a man desires a form, he enters it." He said: "And in it is a gathering of the wide-eyed houris, raising their voices." He then mentioned the like of it.