Musnad Ahmad 30:2666

Yazid narrated to us, he said: Muhammad—meaning Ibn Ishaq—informed us, from Abu al-Zinad, from al-A’raj, from Abu Hurayrah, 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 to see me—and then to see me—will be more beloved to him than having the likes of his family and his wealth."