Musnad Ahmad 5:496

Abdullah narrated to us, Zakariya ibn Yahya Zahmuwayh narrated to us, Umar ibn Mujashi’ narrated to us, from Abu Ishaq, from ‘Abd Khayr, who said: I heard Ali saying upon the pulpit: "The best of this nation after its Prophet are Abu Bakr and Umar, and if I wished to name the third, I would have named him." A man said to Abu Ishaq: "They say that you say [there is someone] better in the evil [group]?" He replied: "Are you a Haruri?"