Musnad Abu Ya'la al-Mawsili 110:34

Sa'id ibn Yahya ibn Sa'id al-Umawi narrated to us, he said: My father narrated to me, Ibn Jurayj narrated to us, from 'Amr ibn Abi Husayn, from 'Ikrimah, from Ibn 'Abbas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "The righteous vision is a part—I think he said—of forty-six parts of prophethood."