Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tabarani:8521Muḥammad b. al-Naḍr al-Azdī > Muʿāwiyah b. ʿAmr > Zāʾidah > Ibrāhīm al-Hajarī > Abū al-Aḥwaṣ > ʿAbdullāh

[Machine] Indeed, there are only two types of guidance: the guidance of words and speech, and the most truthful of speech is the word of Allah. And the best of guidance is the guidance of Muhammad ﷺ . And the worst of matters are the newly invented ones, and every innovation is misguidance, and every misguidance leads to the Fire.  

الطبراني:٨٥٢١حَدَّثَنَا مُحَمَّدُ بْنُ النَّضْرِ الْأَزْدِيُّ ثنا مُعَاوِيَةُ بْنُ عَمْرٍو ثنا زَائِدَةُ عَنْ إِبْرَاهِيمَ الْهَجَرِيِّ عَنْ أَبِي الْأَحْوَصِ عَنْ عَبْدِ اللهِ قَالَ

إِنَّمَا هُمَا اثْنَتَانِ الْهَدْيُ وَالْكَلَامُ وَأَصْدَقُ الْحَدِيثِ كَلَامُ اللهِ وَأَحْسَنُ الْهَدْيِ هَدْيُ مُحَمَّدٍ ﷺ وَشَرُّ الْأُمُورِ مُحْدَثَاتُهَا وَكُلُّ مُحْدَثَةٍ بِدْعَةٌ وَكُلُّ بِدْعَةٍ ضَلَالَةٌ وَكُلُّ ضَلَالَةٍ فِي النَّارِ  


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Collected by Suyūṭī
suyuti:2-3522bʿBd Allāh b. ʿKym > Kān ʿMr
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السيوطي:٢-٣٥٢٢b

"عن عبد الله بن عكيم قال: كان عمر يقول: إن أصْدَقَ القِيل قيلُ اللهِ - ﷻ - وَأَحْسَنَ الْهَدْى هَدْىُ مُحَمَّدٍ ﷺ وَشَرَّ الأُمُورِ مُحْدَثَاتُها، وَكُلَّ مُحْدَثَةٍ ضَلاَلَةٌ وَكُلَّ بِدْعَةٍ ضَلاَلَةٌ".  

ابن النجار