عَنْ ابْنِ عَبْدِ اللَّهِ بْنِ مُغَفَّلِ قَالَ: سَمِعَنِي أَبِي وَأَنَا أَقْرَأُ {بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ، الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ} فَلَمَّا انْصَرَفَ قَالَ: يَا بُنَيَّ! إِيَّاكَ وَالْحَدَثَ فِي الْإِسْلَامِ، فَإِنِّي صَلَّيْتُ خَلْفَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ وَخَلْفَ أَبِي بَكْرٍ وَخَلْفَ عُمَرَ وَعُثْمَانَ فَكَانُوا لَا يَسْتَفْتِحُونَ الْقِرَاءَةَ بِـ {بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ} (وَفِي رِوَايَةٍ فَلَا تَقُلْهَا، إِذَا أَنْتَ قَرَأْتَ فَقُلْ {الْحَمْدُ لِلَّهِ رَبِّ الْعَالَمِينَ} قَالَ: وَلَمْ أَرَ رَجُلًا قَطُّ أَبْعَضَ إِلَيْهِ الْحَدَثُ مِنْهُ)
The son (Yazid) of Sayyiduna Abdullah bin Mughaffal (may Allah be pleased with him) says: My father heard me reciting {بِسْمِ اللّٰہِ الرَّحْمٰنِ الرَّحِیْمِ۔ اَلْحَمْدُ لِلّٰہِ رَبِّ الْعَالَمِیْنَ}, and when he finished, he said to me: O my beloved son! Beware of introducing new things (innovations) in Islam. I have offered prayer behind the Messenger of Allah (peace and blessings be upon him), Sayyiduna Abu Bakr, Sayyiduna Umar, and Sayyiduna Uthman (may Allah be pleased with them), and they did not begin the recitation with {بِسْمِ اللّٰہِ الرَّحْمٰنِ الرَّحِیْمِ}. So you also should not recite it, and start the recitation with {اَلْحَمْدُ لِلّٰہِ رَبِّ الْعَالَمِیْنَ}. His son says: I have not seen anyone who disliked innovation more than my father.