Musnad Ahmad

It is narrated from Tariq bin Shihab that once Marwan had the pulpit brought out on the day of Eid, which was not customary, and he began delivering the sermon before the prayer, which had never happened before. Seeing this, a man stood up and said, "Marwan! You have opposed the Sunnah. You brought out the pulpit on the day of Eid, which was not done before, and you delivered the sermon before the prayer, which had never happened before." In that gathering, Hazrat Abu Saeed Khudri (may Allah be pleased with him) was also present. He asked, "Who is this man?" People informed him that he is so-and-so, son of so-and-so. He said, "This person has fulfilled his responsibility. I heard the Prophet (peace and blessings be upon him) say: 'Whoever among you sees an evil, let him change it with his hand; if he is not able to do so, then with his tongue; and if he is not able to do so, then with his heart—and that is the weakest level of faith.'"