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] A group of people from the Bedouin Arab tribe came to the Prophet Muhammad ﷺ while they were seeking the spoils of war. So the Messenger of Allah ﷺ urged the people to give charity, but they hesitated until it could be seen on his face. Then a man from the Ansar (helpers of the Prophet) brought a piece of silver and threw it, and the people followed suit until it was known on his face. The Prophet ﷺ said, "Whoever starts a good practice and is followed by others, will receive the reward of it and the equivalent reward of those who follow it, without any decrease in their own rewards. And whoever starts an evil practice and is followed by others, will carry the burden of it and the burden of those who follow it, without any decrease in their own burdens."  

أَنَّ قَوْمًا أَتَوْا النَّبِيَّ ﷺ مِنَ الْأَعْرَابِ مُجْتَابِي النِّمَارِ فَحَثَّ رَسُولُ اللهِ ﷺ النَّاسَ عَلَى الصَّدَقَةِ فَأَبْطَئُوا حَتَّى رُئِيَ ذَلِكَ فِي وَجْهِهِ فَجَاءَ رَجُلٌ مِنَ الْأَنْصَارِ بِقِطْعَةِ تِبْرٍ فَطَرَحَهَا فَتَتَابَعَ النَّاسُ حَتَّى عُرِفَ ذَلِكَ فِي وَجْهِهِ فَقَالَ مَنْ سَنَّ سُنَّةً حَسَنَةً فَعُمِلَ بِهَا مِنْ بَعْدِهِ كَانَ لَهُ أَجْرُهَا وَمِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْتَقَصَ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً عُمِلَ بِهَا مِنْ بَعْدِهِ كَانَ عَلَيْهِ وِزْرُهَا وَوِزْرُ مَنْ عَمِلَ بِهَا وَلَا يُنْقِصُ ذَلِكَ 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 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 Messenger of Allah, ﷺ , said, "Whoever establishes a good Sunnah (practice) in Islam, and it is acted upon after him, he will be rewarded and those who act upon it after him will not have their reward reduced in any way. And whoever establishes a bad Sunnah (practice) in Islam, and it is acted upon after him, he will bear the burden of sin for it and those who act upon it after him will not have their burden reduced in any way."  

قَالَ رَسُولُ اللهِ ﷺ «مَا مِنْ أَحَدٍ يَسُنُّ سُنَّةً حَسَنَةً فِي الْإِسْلَامِ فَيُعْمَلُ بِهَا مِنْ بَعْدِهِ إِلَّا كَانَ لَهُ مِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا مِنْ بَعْدِهِ مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً فِي الْإِسْلَامِ فَيُعْمَلُ بِهَا مِنْ بَعْدِهِ إِلَّا كَانَ عَلَيْهِ مِثْلُ أَوْزَارِ الَّذِينَ يَعْمَلُونَ بِهَا مِنْ بَعْدِهِ مِنْ غَيْرِ أَنْ يَنْقُصَ 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»