Language:
كتاب الزكاة
24  
Obligatory Charity Tax (Zakat)
(26)
Chapter: The reward of the lady who gives in charity, from her husband’s house
(26)
باب أَجْرِ الْمَرْأَةِ إِذَا تَصَدَّقَتْ أَوْ أَطْعَمَتْ مِنْ بَيْتِ زَوْجِهَا غَيْرَ مُفْسِدَةٍ
Sahih al-Bukhari 1441

Narrated `Aisha:

The Prophet (ﷺ) said, "When a woman gives in charity from her house meals in Allah's Cause without spoiling her husband's property, she will get a reward for it, and her husband will also get the reward for his earnings and the storekeeper will get a reward likewise."

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ شَقِيقٍ، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ إِذَا أَنْفَقَتِ الْمَرْأَةُ مِنْ طَعَامِ بَيْتِهَا غَيْرَ مُفْسِدَةٍ فَلَهَا أَجْرُهَا، وَلِلزَّوْجِ بِمَا اكْتَسَبَ، وَلِلْخَازِنِ مِثْلُ ذَلِكَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1441
In-book reference : Book 24, Hadith 44
USC-MSA web (English) reference : Vol. 2, Book 24, Hadith 521
  (deprecated numbering scheme)