Sayyiduna Abu Sa'id (may Allah be pleased with him) says: Marwan bin al-Hakam had the pulpit brought out on the day of Eid, and he began the sermon before the prayer. A man stood up and said: Marwan! You have gone against the Sunnah. You had the pulpit brought out on the day of Eid, although it was never brought out before, and you began the sermon before the prayer, although the sermon used to come after the prayer. Sayyiduna Abu Sa'id (may Allah be pleased with him) asked: Who was that? They said: It was so-and-so son of so-and-so. Sayyiduna Abu Sa'id (may Allah be pleased with him) said: As for this man, he has fulfilled what was upon him. I heard the Prophet (peace and blessings be upon him) say: "Whoever sees an evil and has the power to stop it with his hand, let him stop it; otherwise let him forbid it with his tongue; and if he does not have even that much power, let him hate it in his heart. That is the weakest of faith."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة العيدين / 6202