Musnad Ahmad 30:3462

Yazid narrated to us, Hisham informed us, from Muhammad, from Abu Hurairah, who said: We were with him, and they either boasted or spoke of their numbers, and they said: "The men in Paradise are more than the women." Abu Hurairah said: "Did Abu al-Qasim (peace and blessings of Allah be upon him) not say: 'The first group of my nation to enter Paradise, their faces will be like the image of the moon on the night of the full moon, and the second group will be like the brightest glittering star in the sky. Each man among them will have two wives from the Houris, the marrow of whose shins will be visible from beneath their garments.' By the One in Whose hand is the soul of Muhammad, there is no unmarried person in it."