Musnad Abu Ya'la al-Mawsili 131:21

Uthman narrated to us, Jarir narrated to us, from al-Mukhtar ibn Fulful, from Anas ibn Malik, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "I am the first of the people to intercede in Paradise, and I am the one among the prophets with the most followers."