Musannaf Ibn Abi Shayba 3:2800

Abu Bakr narrated to us, he said: Abu al-Ahwas narrated to us, from Simak, from Jabir ibn Samurah, who said: The Messenger of Allah (may Allah bless him and grant him peace) used to have two sermons. He would sit between them, recite the Quran, and remind the people.