Sahih Muslim Book - 47, Hadith - 6800

حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ ، حَدَّثَنَا جَرِيرُ بْنُ عَبْدِ الْحَمِيدِ ، عَنِ الأَعْمَشِ ، عَنْ مُوسَى بْنِ عَبْدِ اللهِ بْنِ يَزِيدَ ، وَأَبِي الضُّحَى ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ هِلاَلٍ الْعَبْسِيِّ ، عَنْ جَرِيرِ بْنِ عَبْدِ اللهِ ، قَالَ : جَاءَ نَاسٌ مِنَ الأَعْرَابِ إِلَى رَسُولِ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَيْهِمِ الصُّوفُ فَرَأَى سُوءَ حَالِهِمْ قَدْ أَصَابَتْهُمْ حَاجَةٌ ، فَحَثَّ النَّاسَ عَلَى الصَّدَقَةِ ، فَأَبْطَؤُوا 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 اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : مَنْ سَنَّ فِي الإِسْلاَمِ سُنَّةً حَسَنَةً ، فَعُمِلَ بِهَا بَعْدَهُ ، كُتِبَ لَهُ مِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا ، وَلاَ يَنْقُصُ مِنْ أُجُورِهِمْ شَيْءٌ ، وَمَنْ سَنَّ فِي الإِسْلاَمِ سُنَّةً سَيِّئَةً ، فَعُمِلَ بِهَا بَعْدَهُ ، كُتِبَ عَلَيْهِ مِثْلُ وِزْرِ مَنْ عَمِلَ بِهَا ، وَلاَ يَنْقُصُ مِنْ أَوْزَارِهِمْ شَيْءٌ.

It was narrated that Jarir bin 'Abdullah said: "Some Bedouins came to the Messenger of Allah (s.a.w) wearing woolen garments, and he saw their bad condition and that they were in need, so he urged the people to give in charity, but they were so slow that (his disapproval) could be seen in his face. "Then an Ansari man brought a purse of silver, then another came, then they came one after another, until signs of happiness could be seen in his face. The Messenger of Allah (s.a.w) said: 'Whoever starts a good practice in Islam that is followed after he is gone, there will be written for him a reward like that of those who do it, without that detracting from their reward in the slightest. Whoever starts a bad practice in Islam that is followed after he is gone, there will be written for him a burden of sin like that of those who do it, without that detracting from their burden in the slightest."'