Sahih Al Bukhari – Book of Judgments (Ahkaam)

Volumn 009, Book 089, Hadith Number 252.
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Narated By 'Abdullah bin 'Umar : Allah's Apostle said, "Surely! Everyone of you is a guardian and is responsible for his charges: The Imam (ruler) of the people is a guardian and is responsible for his subjects; a man is the guardian of his family (household) and is responsible for his subjects; a woman is the guardian of her husband's home and of his children and is responsible for them; and the slave of a man is a guardian of his master's property and is responsible for it. Surely, everyone of you is a guardian and responsible for his charges."