Jabir ibn Abdullah reported: The Messenger of Allah, peace and blessings be upon him, would praise Allah in his sermon, as He deserves to be praised, and then he would say, “Whomever Allah guides, no one can lead him astray. Whomever Allah sends astray, no one can guide him. The truest word is the Book of Allah and the best guidance is the guidance of Muhammad. The most evil matters in religion are those that are newly invented, for every newly invented matter is an innovation, every innovation is misguidance, and every misguidance is in the Hellfire.”
Source: Sunan al-Nasā’ī 1578
Grade: Sahih (authentic) according to Al-Albani
عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ قَالَ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ فِي خُطْبَتِهِ يَحْمَدُ اللَّهَ وَيُثْنِي عَلَيْهِ بِمَا هُوَ أَهْلُهُ ثُمَّ يَقُولُ مَنْ يَهْدِهِ اللَّهُ فَلَا مُضِلَّ لَهُ وَمَنْ يُضْلِلْهُ فَلَا هَادِيَ لَهُ إِنَّ أَصْدَقَ الْحَدِيثِ كِتَابُ اللَّهِ وَأَحْسَنَ الْهَدْيِ هَدْيُ مُحَمَّدٍ وَشَرُّ الْأُمُورِ مُحْدَثَاتُهَا وَكُلُّ مُحْدَثَةٍ بِدْعَةٌ وَكُلُّ بِدْعَةٍ ضَلَالَةٌ وَكُلُّ ضَلَالَةٍ فِي النَّارِ
1578 سنن النسائي كتاب صلاة العيدين من يهده الله فلا مضل له ومن يضلله فلا هادي له
1577 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح النسائي