Sahih al-Bukhari, Volume 7, Book 64, Hadith 273 (USC-MSA) ⓘ
Narrated Abu Huraira: The Prophet said, "If the wife gives of her husband's property (something in charity) without his permission, he will get half the reward."
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 " .
also referenced under: Book 69, Hadith 10 (In-Book) & Hadith 5360 (DarusSalam)