حَدَّثَنِي مَالِكٌ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ أَبِي الْحُبَابِ، سَعِيدِ بْنِ يَسَارٍ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ مَنْ تَصَدَّقَ بِصَدَقَةٍ مِنْ كَسْبٍ طَيِّبٍ - وَلاَ يَقْبَلُ اللَّهُ إِلاَّ طَيِّبًا - كَانَ إِنَّمَا يَضَعُهَا فِي كَفِّ الرَّحْمَنِ يُرَبِّيهَا كَمَا يُرَبِّي أَحَدُكُمْ فَلُوَّهُ أَوْ فَصِيلَهُ حَتَّى تَكُونَ مِثْلَ الْجَبَلِ ‏"‏ ‏.‏

Malik related to me from Yahya ibn Said from Abu'l-Hubab Said ibnYasar that the Messenger of Allah, may Allah bless him and grant himpeace, said, "Whoever gives sadaqa from good earning - and Allah onlyaccepts the good - it is as if he placed it in the palm of theMerciful to raise it, as one of you raises his foal or young cameluntil it is like the mountain " Translation Not Available

Book Ref: Muwatta Imam Malik Book 58 Hadith 1844
Web Ref:  Muwatta Imam Malik Book 58 Hadith 1