Hadith on Charity: Allah multiplies reward for spending charity

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said, “None gives charity from what is good, for Allah only accepts what is good, except that the Merciful takes it with his right hand. Even if it is a date, it is nurtured in the hand of the Merciful until it becomes greater than a mountain, just as one of you nurtures his young horse or camel.”

Source: Ṣaḥīḥ Muslim 1014

Grade: Sahih (authentic) according to Muslim

عن أبي هريرة قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَا تَصَدَّقَ أَحَدٌ بِصَدَقَةٍ مِنْ طَيِّبٍ وَلَا يَقْبَلُ اللَّهُ إِلَّا الطَّيِّبَ إِلَّا أَخَذَهَا الرَّحْمَنُ بِيَمِينِهِ وَإِنْ كَانَتْ تَمْرَةً فَتَرْبُو فِي كَفِّ الرَّحْمَنِ حَتَّى تَكُونَ أَعْظَمَ مِنْ الْجَبَلِ كَمَا يُرَبِّي أَحَدُكُمْ فَلُوَّهُ أَوْ فَصِيلَهُ

1014 صحيح مسلم كتاب الزكاة باب قبول الصدقة من الكسب الطيب وتربيتها