Sahih Bukhari
Sales and Trade
Volume: 003 / Book Number: 034 / Hadith Number: 413
Narrated 'Aisha:
Hind, the mother of Mu'awiya said to Allah's Apostle, "Abu Sufyan (her husband) is a miser. Am I allowed to take from his money secretly?" The Prophet said to her, "You and your sons may take what is sufficient reasonably and fairly."