Messenger of Allah ﷺ said, "When a woman gives in charity from her husband's meals without wasting the property of her husband, she will get a reward for it, and her husband too will get a reward for what he earned and the storekeeper will have the reward likewise."
قَالَ رَسُولُ اللَّهِ ﷺ إِذَا تَصَدَّقَتِ الْمَرْأَةُ مِنْ طَعَامِ زَوْجِهَا غَيْرَ مُفْسِدَةٍ كَانَ لَهَا أَجْرُهَا وَلِزَوْجِهَا بِمَا كَسَبَ وَلِلْخَازِنِ مِثْلُ ذَلِكَ