Musnad Abu Ya'la al-Mawsili 108:219

Ubayd Allah ibn Umar narrated to us, Hammad narrated to us, Amr ibn Dinar narrated to us, from Jabir ibn Abdullah, that a man from the Emigrants (Muhajirun) kicked a man from the Helpers (Ansar). The people of this one and the people of that one gathered. The latter said, "O for the Emigrants!" And the former said, "O for the Helpers!" This reached the Messenger of Allah, may Allah bless him and grant him peace, and he said, "Leave it, for it is foul." Then he said, "What is the matter with the call of the Age of Ignorance? What is the matter with the call of the Age of Ignorance?"