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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
tirmidhi:2677 – ʿAbdullāh b. ʿAbd al-Raḥman > Muḥammad b. ʿUyaynah > Marwān b. Muʿāwiyah al-Fazārī > Kathīr b. ʿAbdullāh from his father from his grandfather

narrated from his father, from his grandfather that the Prophet ﷺ said to Bilal bin Al-Harith: "Know." He said: "I am ready to know O Messenger of Allah!" He ﷺ said: "That indeed whoever revives a Sunnah from my Sunnah which has died after me, then for him is a reward similar to whoever acts upon it without diminishing anything from their rewards. And whoever introduces an erroneous innovation which Allah is not pleased with, nor His Messenger, then he shall receive sins similar to whoever acts upon it, without that diminishing anything from the sins of the people.'"  

الترمذي:٢٦٧٧ – حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عَبْدِ الرَّحْمَنِ أَخْبَرَنَا مُحَمَّدُ بْنُ عُيَيْنَةَ عَنْ مَرْوَانَ بْنِ مُعَاوِيَةَ الْفَزَارِيِّ عَنْ كَثِيرِ بْنِ عَبْدِ اللَّهِ عَنْ أَبِيهِ عَنْ جَدِّهِ

أَنَّ النَّبِيَّ ﷺ قَالَ لِبِلاَلِ بْنِ الْحَارِثِ اعْلَمْ قَالَ مَا أَعْلَمُ يَا رَسُولَ اللَّهِ قَالَ اعْلَمْ يَا بِلاَلُ قَالَ مَا أَعْلَمُ يَا رَسُولَ اللَّهِ قَالَ أَنَّهُ مَنْ أَحْيَا سُنَّةً مِنْ سُنَّتِي قَدْ أُمِيتَتْ بَعْدِي فَإِنَّ لَهُ مِنَ الأَجْرِ مِثْلَ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أُجُورِهِمْ شَيْئًا وَمَنِ ابْتَدَعَ بِدْعَةَ ضَلاَلَةٍ لاَ يَرْضَاهَا اللَّهُ وَرَسُولُهُ كَانَ عَلَيْهِ مِثْلُ آثَامِ مَنْ عَمِلَ بِهَا لاَ يَنْقُصُ ذَلِكَ مِنْ أَوْزَارِ النَّاسِ شَيْئًا  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ وَمُحَمَّدُ بْنُ عُيَيْنَةَ هُوَ مِصِّيصِيٌّ شَامِيٌّ وَكَثِيرُ بْنُ عَبْدِ اللَّهِ هُوَ ابْنُ عَمْرِو بْنِ عَوْفٍ الْمُزَنِيُّ

See similar narrations below:

Collected by Ibn Mājah, Ṭabarānī, Suyūṭī
ibnmajah:210 – Muḥammad b. Yaḥyá > Ismāʿīl b. Abū Ūways > Kathīr b. ʿAbdullāh from his father from his grandfather

"I heard the Messenger of Allah say: 'Whoever revives a Sunnah of mine that dies out after I am gone, he will have a reward equivalent to that of those among the people who act upon it, without that detracting from their reward in the slightest. Whoever introduces an innovation (Bid'ah) with which Allah and his Messenger are not pleased, he will have a (burden of) sin equivalent to that of those among the people who act upon it, without that detracting from their sins in the slightest.'"  

ابن ماجة:٢١٠ – حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى حَدَّثَنَا إِسْمَاعِيلُ بْنُ أَبِي أُوَيْسٍ حَدَّثَنِي كَثِيرُ بْنُ عَبْدِ اللَّهِ عَنْ أَبِيهِ عَنْ جَدِّهِ قَالَ

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَنْ أَحْيَا سُنَّةً مِنْ سُنَّتِي قَدْ أُمِيتَتْ بَعْدِي فَإِنَّ لَهُ مِنَ الأَجْرِ مِثْلَ أَجْرِ مَنْ عَمِلَ بِهَا مِنَ النَّاسِ لاَ يَنْقُصُ مِنْ أُجُورِ النَّاسِ شَيْئًا وَمَنِ ابْتَدَعَ بِدْعَةً لاَ يَرْضَاهَا اللَّهُ وَرَسُولُهُ فَإِنَّ عَلَيْهِ مِثْلَ إِثْمِ مَنْ عَمِلَ بِهَا مِنَ النَّاسِ لاَ يَنْقُصُ مِنْ آثَامِ النَّاسِ شَيْئًا  

tabarani:14139 – ʿAlī b. al-Mubārak > Ismāʿīl b. Abū Ūways > Kathīr b. ʿAbdullāh al-Muzanī from his father from his grandfather

"I heard the Messenger of Allah say: 'Whoever revives a Sunnah of mine that dies out after I am gone, he will have a reward equivalent to that of those among the people who act upon it, without that detracting from their reward in the slightest. Whoever introduces an innovation (Bid'ah) with which Allah and his Messenger are not pleased, he will have a (burden of) sin equivalent to that of those among the people who act upon it, without that detracting from their sins in the slightest.'" (Using translation from Ibn Mājah 210)  

الطبراني:١٤١٣٩ – حَدَّثَنَا عَلِيُّ بْنُ الْمُبَارَكِ ثَنَا إِسْمَاعِيلُ بْنُ أَبِي أُوَيْسٍ حَدَّثَنِي كَثِيرُ بْنُ عَبْدِ اللهِ الْمُزَنِيُّ عَنْ أَبِيهِ عَنْ جَدِّهِ قَالَ

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «مَنْ أَحْيَا سُنَّةً مِنْ سُنَّتِي قَدْ أُمِيتَتْ بَعْدِي فَإِنَّ لَهُ مِثْلَ أَجْرِ مَنْ عَمِلَ بِهَا مِنَ النَّاسِ لَا يَنْقُصُ ذَلِكَ مِنْ أُجُورِ النَّاسِ شَيْئًا وَمَنِ ابْتَدَعَ بِدْعَةً لَا يَرْضَاهَا اللهُ وَرَسُولُهُ فَإِنَّ عَلَيْهِ مِثْلَ إِثْمِ مَنْ عَمِلَ بِهَا مِنَ النَّاسِ لَا يَنْقُصُ ذَلِكَ مِنْ آثَامِ النَّاسِ شَرًّا»  

suyuti:3591a –

"I heard the Messenger of Allah say: 'Whoever revives a Sunnah of mine that dies out after I am gone, he will have a reward equivalent to that of those among the people who act upon it, without that detracting from their reward in the slightest. Whoever introduces an innovation (Bid'ah) with which Allah and his Messenger are not pleased, he will have a (burden of) sin equivalent to that of those among the people who act upon it, without that detracting from their sins in the slightest.'" (Using translation from Ibn Mājah 210)   

السيوطي:٣٥٩١a –

"اعْلَمْ يا بلالُ أَنَّهُ من أحيا سُنَّةً من سُنَّتِي قد أُمِيتَتْ بعدى كان له من الأَجْرِ مثلُ من عمل بها من غيرِ أن يَنْقُصَ من أُجُورِهم شيئًا، ومن ابتدعَ بدعةَ ضَلالةٍ، لا يَرْضَاهَا اللهُ ورسولُه كان عليه مثلُ آثام من عمِل بها، لا ينقُصُ ذلك من أَوزَارِ الناس شيئًا" .  

suyuti:20284a –
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السيوطي:٢٠٢٨٤a –

"مَنْ أَحْيَا سُنَّةً مِنْ سُنَّتِى قَد أُمِيتَتْ بَعْدِى فإِنَّ لَهُ مِنَ الأجْرِ مِثْلَ منْ عَمِلهَا منَ النَّاسَ لا يَنْقُصُ من أجُورِ النَّاسِ شَيئًا، وَمَنْ ابْتَدَعَ بِدْعةً لَا يرْضَاهَا اللهُ وَرَسُولُه، فإِنَّ عَليهِ مِثْلَ إِثْمٍ مَنْ عَمِلَ بِهَا مِنَ النَّاسِ، لَا يَنْقُصُ مِنْ آثَامِ النَّاسِ شَيئًا".  

[طب] الطبرانى في الكبير وأبو نصر السجزى في الإبانة عنه