Wahb bin Kaysan narrates: On the day of Eid I heard Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with them both), when he had prayed before the sermon and then stood up and addressed the people, (say:) "O people! All of this is the Sunnah (laid down) by Allah Almighty and the Sunnah of His Messenger."
Ahmad recorded it, and its narrators are thiqat (trustworthy).