He who introduced some good practice in Islam which was followed after him (by people) he would be assured of reward like one who followed it, without their rewards being diminished in any respect. And he who introduced some evil practice in Islam which had been followed subsequently (by others), he would be required to bear the burden like that of one who followed this (evil practice) without their's being diminished in any respect.  

جَاءَ نَاسٌ مِنَ الأَعْرَابِ إِلَى رَسُولِ اللَّهِ ﷺ عَلَيْهِمُ الصُّوفُ فَرَأَى سُوءَ حَالِهِمْ قَدْ أَصَابَتْهُمْ حَاجَةٌ فَحَثَّ النَّاسَ عَلَى الصَّدَقَةِ فَأَبْطَئُوا عَنْهُ حَتَّى رُئِيَ ذَلِكَ فِي وَجْهِهِ قَالَ ثُمَّ إِنَّ رَجُلاً مِنَ الأَنْصَارِ جَاءَ بِصُرَّةٍ مِنْ وَرِقٍ ثُمَّ جَاءَ آخَرُ ثُمَّ تَتَابَعُوا حَتَّى عُرِفَ السُّرُورُ فِي وَجْهِهِ فَقَالَ رَسُولُ اللَّهِ ﷺ مَنْ سَنَّ فِي الإِسْلاَمِ سُنَّةً حَسَنَةً فَعُمِلَ بِهَا بَعْدَهُ كُتِبَ لَهُ مِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا وَلاَ يَنْقُصُ مِنْ أُجُورِهِمْ شَىْءٌ وَمَنْ سَنَّ فِي الإِسْلاَمِ سُنَّةً سَيِّئَةً فَعُمِلَ بِهَا بَعْدَهُ كُتِبَ عَلَيْهِ مِثْلُ وِزْرِ مَنْ عَمِلَ بِهَا وَلاَ يَنْقُصُ مِنْ أَوْزَارِهِمْ شَىْءٌ  

"The Messenger of Allah said: 'Whoever introduces a good practice that is followed, he will receive its reward and a reward equivalent to that of those who follow it, without that detracting from their reward in their slightest. And whoever introduces a bad practice that is followed, he will receive its sin and a burden of sin equivalent to that of those who follow it, without that detracting from their burden in the slightest.'"  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ سَنَّ سُنَّةً حَسَنَةً فَعُمِلَ بِهَا كَانَ لَهُ أَجْرُهَا وَمِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا لاَ يَنْقُصُ مِنْ أُجُورِهِمْ شَيْئًا وَمَنْ سَنَّ سُنَّةً سَيِّئَةً فَعُمِلَ بِهَا كَانَ عَلَيْهِ وِزْرُهَا وَوِزْرُ مَنْ عَمِلَ بِهَا مِنْ بَعْدِهِ لاَ يَنْقُصُ مِنْ أَوْزَارِهِمْ شَيْئًا  

[Machine] The Messenger of Allah ﷺ addressed us and urged us to give charity. The people seemed reluctant, until anger was seen on his face. He said it a few more times, until a man from the Ansar came with a pile of goods and gave it as charity. Then people followed suit and started giving until happiness was seen on his face. He said, "Whoever starts a good tradition will have its reward and the reward of those who do it, without any decrease in their rewards. And whoever starts an evil tradition, will bear its burden and the burden of those who do it, without any decrease in their burdens." He said this, referring to Abu Mu'awiyah, without decreasing their burdens.  

خَطَبَنَا رَسُولُ اللهِ ﷺ فَحَثَّنَا عَلَى الصَّدَقَةِ فَأَبْطَأَ النَّاسُ حَتَّى رُئِيَ فِي وَجْهِهِ الْغَضَبُ وَقَالَ مَرَّةً حَتَّى بَانَ ثُمَّ إِنَّ رَجُلًا مِنَ الْأَنْصَارِ جَاءَ بِصُرَّةٍ فَأَعْطَاهَاإِيَّاهُ ثُمَّ تَتَابَعَ النَّاسُ فَأَعْطَوْا حَتَّى رُئِيَ فِي وَجْهِهِ السُّرُورُ فَقَالَ مَنْ سَنَّ سُنَّةً حَسَنَةً كَانَ لَهُ أَجْرُهَا وَمِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْتَقَصَ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً كَانَ عَلَيْهِ وِزْرُهَا وَمِثْلُ وِزْرِ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْتَقَصَ مِنْ أَوْزَارِهِمْ شَيْءٌ قَالَ مَرَّةً يَعْنِي أَبَا مُعَاوِيَةَ مِنْ غَيْرِ أَنْ يَنْقُصَ  

[Machine] The Messenger of Allah ﷺ delivered a sermon and exhorted the people to give charity. They were slow to respond until anger became apparent on his face. Then, a man from the Ansar came with a bag filled with items, and the people began to follow suit until it was seen on his face that he was delighted. He said, "Whoever starts a good practice will receive its reward and the reward of those who follow it, without reducing anything from their rewards. And whoever initiates an evil practice shall carry its burden and the burden of those who act upon it, without diminishing anything from their burdens."  

خَطَبَنَا رَسُولُ اللَّهِ ﷺ فَحَثَّ النَّاسَ عَلَى الصَّدَقَةِ فَأَبْطَئُوا حَتَّى بَانَ فِي وَجْهِهِ الْغَضَبُ ثُمَّ إِنَّ رَجُلًا مِنَ الْأَنْصَارِ جَاءَ بِصُرَّةٍ فَتَتَابَعَ النَّاسُ حَتَّى رُئِيَ فِي وَجْهِهِ السُّرُورُ فَقَالَ «مَنْ سَنَّ سُنَّةً حَسَنَةً كَانَ لَهُ أَجْرُهُ وَمِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْقَصَ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً كَانَ عَلَيْهِ وِزْرُهُ وَمِثْلُ وِزْرِ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْقَصَ مِنْ أَوْزَارِهِمْ شَيْءٌ»  

[Machine] A group of people from the desert came to the Prophet ﷺ seeking advice. The Prophet ﷺ encouraged people to give charity, but they hesitated until it was evident on the face of the Messenger of Allah ﷺ. Then, a man from the Ansar came with a piece of gold, and he threw it. People started following one another in giving charity until joy became apparent on the face of the Messenger of Allah ﷺ. He said, "Whoever starts a good tradition that is followed, then he will have a reward similar to those who follow it, without their rewards being diminished. And whoever starts an evil tradition that is followed, then he will bear the burden of sin and the burden of those who follow it, without their burdens being diminished."  

جَاءَ قَوْمٌ مِنْ أَهْلِ الْبَادِيَةِ إِلَى النَّبِيِّ ﷺ مُجْتَابِي النِّمَارِ فَسَأَلُوهُ فَحَثَّ النَّبِيُّ ﷺ النَّاسَ عَلَى الصَّدَقَةِ فَأَبْطَئُوا بِهَا حَتَّى عُرِفَ ذَلِكَ فِي وَجْهِ رَسُولِ اللهِ ﷺ فَجَاءَ رَجُلٌ مِنَ الْأَنْصَارِ بِقِطْعَةِ تِبْرٍ فَأَلْقَاهَا فَتَتَابَعَ النَّاسُ فِي الصَّدَقَةِ حَتَّى عُرِفَ السُّرُورُ فِي وَجْهِ رَسُولِ اللهِ ﷺ وَقَالَ «مَنْ سَنَّ سُنَّةً حَسَنَةً فَعُمِلَ بِهَا بَعْدَهُ كَانَ لَهُ مِثْلُ أَجْرِهَا وَأَجْرِ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً فَعُمِلَ بِهَا كَانَ عَلَيْهِ وِزْرُهَا وَوِزْرُ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أَوْزَارِهِمْ شَيْءٌ»  

[Machine] A man asked the Messenger of Allah ﷺ to encourage people to give charity until it could be seen in his face. Then a man from the Ansar came with a gift and presented it to the Prophet ﷺ. The joy could be seen in the face of the Messenger of Allah ﷺ. He said, "Whoever establishes a good practice in Islam and someone practices it after him, both receive a reward for it and the reward of everyone who acts upon it does not diminish in any way. And whoever establishes a bad practice in Islam and someone practices it after him, carries the burden of both and the burden of everyone who acts upon it does not diminish in any way."  

سَأَلَ رَجُلٌ رَسُولَ اللهِ ﷺ فَحَثَّ النَّاسَ عَلَى الصَّدَقَةِ حَتَّى رُؤِيَ ذَلِكَ فِي وَجْهِ رَسُولِ اللهِ ﷺ فَجَاءَ رَجُلٌ مِنَ الْأَنْصَارِ بِذَهَبَةٍ فَنَبَذَهَا إِلَى النَّبِيِّ ﷺ فَرُؤِيَ السُّرُورُ فِي وَجْهِ رَسُولِ اللهِ ﷺ فَقَالَ «مَنْ سَنَّ سُنَّةً حَسَنَةً فِي الْإِسْلَامِ فَعُمِلَ بِهَا مِنْ بَعْدِهِ كَانَ لَهُ أَجْرُهَا وَمَثَلُ أَجْرِ مَنْ عَمِلَ بِهَا لَا يَنْقُصُ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً فِي الْإِسْلَامِ فَعُمِلَ بِهَا بَعْدَهُ كَانَ عَلَيْهِ وِزْرُهَا وَمَثَلُ وِزْرِ مَنْ عَمِلَ بِهَا لَا يَنْقُصُ مِنْ أَوْزَارِهِمْ شَيْءٌ»  

[Machine] The Prophet ﷺ once came across a group of Bedouins and noticed their poverty and hardship. He addressed the people, praised and glorified Allah, and then commanded them to give charity. He urged them and encouraged them to do so. They hesitated until the happiness could be seen in the face of the Messenger of Allah ﷺ . Then, a man came forward with a handful of leaves and gave it to him as charity. Another man followed and the people started giving charity one after another, until the happiness could be seen in the face of the Messenger of Allah ﷺ . He then said, "Whoever establishes a good practice in Islam, and it is acted upon after him, will receive its reward and the reward of those who act upon it without it detracting from their rewards. And whoever establishes an evil practice in Islam, and it is acted upon after him, will bear its burden and the burden of those who act upon it without it detracting from their burdens."  

أَتَى النَّبِيَّ ﷺ قَوْمٌ مِنَ الْأَعْرَابِ فَأَبْصَرَ عَلَيْهِمُ الْخَصَاصَةَ وَالْجَهْدَ فَخَطَبَ النَّاسَ فَحَمِدَ اللهَ ﷻ وَأَثْنَى عَلَيْهِ ثُمَّ أَمَرَهُمْ بِالصَّدَقَةِ وَحَضَّهُمْ عَلَيْهَا وَرَغَّبَهُمْ فِيهَا فَأَبْطَئُوا عَلَيْهِ حَتَّى رُؤِيَ ذَلِكَ فِي وَجْهِهِ فَجَاءَ رَجُلٌ بِقَبْضَةٍ مِنْ وَرِقٍ فَأَعْطَاهَا إِيَّاهُ ثُمَّ جَاءَ آخَرُ حَتَّى تَتَابَعَ النَّاسُ بِالصَّدَقَةِ حَتَّى رُؤِيَ فِي وَجْهِ رَسُولِ اللهِ ﷺ السُّرُورُ فَقَالَ «مَنْ سَنَّ فِي الْإِسْلَامِ سُنَّةً حَسَنَةً فَعُمِلَ بِهَا بَعْدَهُ كَانَ لَهُ أَجْرُهَا وَأَجْرُ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْتَقَصَ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ فِي الْإِسْلَامِ سُنَّةً سَيِّئَةً فَعُمِلَ بِهَا مِنْ بَعْدِهِ كَانَ عَلَيْهِ وِزْرُهَا وَوِزْرُ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أَوْزَارِهِمْ شَيْءٌ»