Musnad Ahmad 27:1575

Abu al-Yaman narrated to us, Shu'ayb informed me, he said: Nafi' said: I heard Abdullah ibn Umar saying: Indeed, the Messenger of Allah, peace and blessings of Allah be upon him, said: "Indeed, the righteous vision" — Nafi' said: I think that Abdullah said — "is a part of seventy parts of prophethood."