Musnad Ahmad 32:1964

Muhammad ibn Ja'far narrated to us, Shu'bah and Hajjaj narrated to us, he said: Shu'bah narrated to me, he said: I heard Qatadah, he said: Anas ibn Malik narrated to us, he said: The Messenger of Allah (may Allah bless him and grant him peace) said: "I and the Hour have been sent like these two." Hajjaj said in his narration: Meaning his two fingers, the index and the middle. Shu'bah said: And I heard Qatadah saying in his stories: "Like the precedence of one of them over the other." I do not know if he mentioned it from Anas, or if Qatadah said it.