Sahih al-Bukhari 5360
Sahih al-Bukhari · Book 69: Supporting the Family · The expenditure of a woman and her child, whose husband is away from her
Narrated Abu Huraira:
حَدَّثَنَا يَحْيَى ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ ، عَنْ مَعْمَرٍ ، عَنْ هَمَّامٍ ، قَالَ سَمِعْتُ أَبَا هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِذَا أَنْفَقَتِ الْمَرْأَةُ مِنْ كَسْبِ زَوْجِهَا عَنْ غَيْرِ أَمْرِهِ فَلَهُ نِصْفُ أَجْرِهِ " .
The Prophet (ﷺ) said, "If the wife gives of her husband's property (something in charity) without his permission, he will get half the reward."