Sunnah.com reference : Book 4, Hadith 39English translation : Book 4, Hadith 658Arabic reference : Book 4, Hadith 637
A’ishah (RAA) narrated that The Messenger of Allah (ﷺ) said:
“When a woman gives some of the foodstuff (which she has in her house) in charity without being extravagant (without being wasteful), she will receive the reward for what she has spent, and her husband will receive the reward because of his earning, and the keeper (if any) will be similarly rewarded. The reward of one will not decrease the reward of the others.” Agreed upon.
وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا قَالَتْ: قَالَ اَلنَّبِيُّ ‏- صلى الله عليه وسلم ‏-{ إِذَا أَنْفَقَتِ اَلْمَرْأَةُ مِنْ طَعَامِ بَيْتِهَا, غَيْرَ مُفْسِدَةٍ, كَانَ لَهَا أَجْرُهَا بِمَا أَنْفَقَتْ وَلِزَوْجِهَا أَجْرُهُ بِمَا اِكْتَسَبَ  1‏ وَلِلْخَازِنِ مِثْلُ ذَلِكَ, وَلَا يَنْقُصُ بَعْضُهُمْ أَجْرَ بَعْضٍ شَيْئًا }  مُتَّفَقٌ عَلَيْهِ.‏  2‏ .‏‏1 ‏- في " الصحيحين ": كسب.‏‏2 ‏- صحيح.‏ رواه البخاري ( 1425 )‏، ومسلم ( 1024 )‏.‏