The Book of Zakat
12/19. Chapter:
Acceptance of charity that comes from good (Tayyib) earnings, and the growth thereof
Sahih Muslim
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ الْقَارِيَّ - عَنْ سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يَتَصَدَّقُ أَحَدٌ بِتَمْرَةٍ مِنْ كَسْبٍ طَيِّبٍ إِلاَّ أَخَذَهَا اللَّهُ بِيَمِينِهِ فَيُرَبِّيهَا كَمَا يُرَبِّي أَحَدُكُمْ فَلُوَّهُ أَوْ قَلُوصَهُ حَتَّى تَكُونَ مِثْلَ الْجَبَلِ أَوْ أَعْظَمَ " .
Abu Huraira reported Allah's Messenger (ﷺ) as saying: No one gives Sadaqa of a date out of his honest earning, but Allah accepts it with His Right Hand, and then fosters it as one of you fosters the colt or a young she-camel, till it becomes like a mountain or even greater.
Reference : Sahih Muslim 1014bIn-book reference : Book 12, Hadith 80USC-MSA web (English) reference : Book 5, Hadith 2212