Everyone of you is a guardian

Narrated 'Abdullah bin 'Umar (Radi-Allahu 'anhu):
The Prophet (Sallallahu 'Alaihi Wa Sallam) said, 

 "Everyone of you is a guardian and everyone of you is responsible (for his wards). 

A ruler is aguardian and is responsible (for his subjects); 

A man is a guardian of his family and responsible (for them);

A wife is a guardian of her husband's house and she is responsible (for it),

A slave is a guardian of his master's property and is responsible (for that).

Beware! All of you are guardians and are responsible (for your wards)."
 
Bukhari Vol. 7 : No. 116