Ayesha reported,

The Messenger of Allah ﷺ said, "When a woman spends from the food of her household without causing waste, she earns her reward for what she has spent, her husband earns his reward for what he has earned, and the storekeeper earns a similar reward. None of them diminishes the reward of the others in the slightest."

Azami 4186

Sahih

عن عائشة، قالت

قال رسول الله ﷺ: إذا أنفقت المرأة من طعام بيتها غير مفسدة كان لها أجرها بما أنفقت، ولزوجها أجرم بما كسب، وللخازن مثل ذلك لا ينقص بعضهم أجر بعض شيئا.

الأعظمي 4186صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Zakat
Chapter
Expenditures
Section
What is permissible for a woman to spend from her husband's wealth and what is not permissible for her
Numbering
Jami al-Kamil 4186 (2nd edition)
Azami 4186