(4) باب نَفَقَةِ الْمَرْأَةِ إِذَا غَابَ عَنْهَا زَوْجُهَا وَنَفَقَةِ الْوَلَدِ
Narrated Abu Huraira:
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."
Reference: Sahih al-Bukhari 5360
In-book reference: Book 69, Hadith 10
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 64, Hadith 273