Musnad Abu Ya'la al-Mawsili 110:109

Abu Hammam narrated to us, Hammad bin Usamah narrated to us, Hisham bin Hassan narrated to us, from Zayd bin al-Hawari, from Ibn Abbas, who said: It was said, "O Messenger of Allah, will we have intercourse with our wives in Paradise as we have intercourse with them in the world?" He said, "By the One in Whose hand is the soul of Muhammad, indeed a man will have intercourse in a single morning with one hundred virgins."