عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((إِنَّ الْعَبْدَ إِذَا تَصَدَّقَ مِنْ طَيِّبٍ، تَقَبَّلَهَا اللَّهُ مِنْهُ وَأَخَذَهَا بِيَمِينِهِ وَرَبَّاهَا كَمَا يُرَبِّي أَحَدُكُمْ مُهْرَهُ أَوْ فَصِيلَهُ، وَإِنَّ الرَّجُلَ لَيَتَصَدَّقُ بِاللُّقْمَةِ فَتَرْبُو فِي يَدِ اللَّهِ أَوْ قَالَ: فِي كَفِّ اللَّهِ حَتَّى تَكُونَ مِثْلَ الْجَبَلِ فَتَصَدَّقُوا))
Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: When a servant gives charity from lawful earnings, Allah Almighty accepts it and takes it in His right hand and keeps increasing it, just as one of you raises his mare or she-camel or calf. A person gives only a morsel in charity, but in Allah’s hand (according to one narrator, in Allah’s pouch) it keeps increasing until it becomes as big as a mountain. So, give charity.