Musnad Ahmad 1012:57

'Abd al-Rahman ibn Mahdi narrated to us, from Shu'bah, and Hajjaj said: Shu'bah narrated to me, from Qatadah, from Anas, from 'Ubadah ibn al-Samit, from the Prophet, may Allah bless him and grant him peace, who said—Hajjaj said in his hadith: I heard Anas, from 'Ubadah ibn al-Samit, from the Prophet, may Allah bless him and grant him peace, that he said: "The vision of the believer, or the Muslim, is one part of forty-six parts of prophethood."