(45) باب الْمَرْأَةِ تَتَصَدَّقُ مِنْ بَيْتِ زَوْجِهَا
A'ishah reported The Messenger of Allah (ﷺ) as saying When a woman gives (some of the property) from her husband's house, not wasting it, she will have her reward for what she has spent, and her husband will have his for what he earned. The said applies to a trustee. In no respect does the one diminish the reward of the other.
Reference: Sunan Abi Dawud 1685
In-book reference: Book 9, Hadith 130
English translation: Book 9, Hadith 1681