(26) باب أَجْرِ الْمَرْأَةِ إِذَا تَصَدَّقَتْ أَوْ أَطْعَمَتْ مِنْ بَيْتِ زَوْجِهَا غَيْرَ مُفْسِدَةٍ
Narrate Aisha:
The Prophet (ﷺ) said, "If a woman gives in charity from her husband's house .." The Prophet (p.b.u.h) also said, "If a lady gives meals (in charity) from her husband's house without spoiling her husband's property, she will get a reward and her husband will also get a reward likewise. The husband will get a reward because of his earnings and the woman because of her spending."
Reference: Sahih al-Bukhari 1440
In-book reference: Book 24, Hadith 43
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 24, Hadith 520