Musnad Abu Ya'la al-Mawsili 115:84

Ubayd Allah ibn Umar narrated to us, Harami ibn Umarah narrated to us, Shu'bah narrated to us, from Qatadah, from Anas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "I and the Hour have been sent like these two." Abu Sa'id said: [He pointed] with his index and middle fingers.