Sunan At-Tirmidhi
Hadith #670
Abu Umamah Al-Bahili said:""During a sermon of his in the year of the Farewell Hajj, I heard the Messenger of Allah say: 'A woman is not to spend anything from her husbands house without her husband's permission.' They said: 'O Messenger of Allah! What about food?' He said: 'That is our most virtuous wealth