430.Hazrat Aisha (Allah be pleased with her) reported that the Messenger Of Allah said: " When a wife spends food of her house without spoiling there is for her its reward for what she gives away and there is also a reward for her husband for what he earns, and the like (reward) for the storekeeper - none of them diminishing aught from the reward of another."
(Bukhari).
(Ideal Woman in Islam. by Imran Muhammad).