عَنِ ابْنِ عَبَّاسٍ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَفْتَتِحُ صَلَاتَهُ بِ (بِسم الله الرَّحْمَن الرَّحِيم) رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ لَيْسَ إِسْنَادُهُ بِذَاكَ

Abu Huraira reported God’s Messenger as saying, “The imam is appointed only to be followed, so when he says the takbir, say it also; and when he recites, listen silently.” Abu Dawud, Nasa’i and Ibn Majah transmitted it.