Charity
مَنْ تَصَدَّقَ بِعَدْلِ تَمْرَةٍ مِنْ كَسْبٍ طَيِّبٍ، وَلَا يَقْبَلُ اللَّهُ إِلَّا الطَّيِّبَ، فَإِنَّ اللَّهَ يَتَقَبَّلُهَا بِيَمِينِهِ، ثُمَّ يُرَبِّيهَا لِصَاحِبِهَا، كَمَا يُرَبِّي أَحَدُكُمْ فَلُوَّهُ، حَتَّى تَكُونَ مِثْلَ الْجَبَلِ
Translation
Whoever gives charity equal to a date from honestly earned wealth - and Allah accepts only what is good - then Allah accepts it with His Right Hand and nurtures it for its owner, as one of you nurtures his foal, until it becomes like a mountain.
Narrator
Abu Hurairah
Source
Sahih Bukhari & Muslim
Bukhari 1410, Muslim 1014