It wasnarrated that Abu Sa'eed said:
"Marwan brought the pulpit outone'Eid day and started to deliver the sermon before the prayer. Amanstood up and said: 'O Commander of the Believers, you have goneagainst the Sunnah. You have brought the pulpit out on the day of'Eidand it was not brought out before, and you started with thesermonbefore the prayer, when this was not done before.' AbuSa'eed said:'As for this man, he has done his duty. I heard theMessenger of Allah(ﷺ) say: "Whoever among you sees an evilaction, and he is able tochange it with his hand, then change itwith his hand (by takingaction); if he cannot, (do so) with histongue then with his tongue(by speaking out); and if he cannot thenwith his heart (by hating itand feeling that it is wrong), and thatis the weakest of faith."
English reference: Vol. 1, Book 5, Hadith 1275
Arabic reference: Book 5, Hadith 1334