Musnad Ahmad 30:3420

Yazid narrated to us, Muhammad ibn Ishaq informed us, from Abu al-Zinad, from al-A’raj, from Abu Hurairah, who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "By the One in whose hand is the soul of Muhammad, a day will surely come upon one of you when, for him to see me, and then for him to see me, would be more beloved to him than having the likes of his family and his wealth."