«إذا أنفقت المرأة من بيت زوجها غير مفسدة كان لها أجرها بما أنفقت ولزوجها أجره بما كسب وللخازن مثل ذلك لا ينقص بعضهم من أجر بعض شيئا»
The Prophet (peace and blessings be upon him) said:
"When a woman spends from her husband's house without causing ruin (that is, with moderation), she has a reward for what she spent, her husband has a reward for what he earned, and the storekeeper (the one in charge) has the like of that as well; and none of them diminishes anything from the reward of the other."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 404