Musnad Abu Ya'la al-Mawsili 152:256

Abu Khaythama narrated to us, Yunus bin Muhammad narrated to us, Yazid bin Zuray' narrated to us, Khalid narrated to us, from Abu Ma'shar, from Ibrahim, from Alqama, from Abdullah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Let those among you who possess discernment and intellect be nearest to me, then those who are next to them, then those who are next to them. And do not differ, for your hearts will differ. And beware of the clamor of the marketplaces."