Musnad Abu Ya'la al-Mawsili 115:158

Muhammad ibn al-Muthanna narrated to us, Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, he said: And I heard Qatadah narrating from Anas, he said: The Messenger of Allah (ﷺ) said: "I and the Hour have been sent like these two." Shu'bah said: I heard Qatadah saying: "Like the superiority of one of them over the other." I do not know if he mentioned it from Anas, or if he said it from Qatadah.