Musnad Ahmad 27:718

Yahya narrated to us, from Ubaydullah, Nafi’ informed me, from Ibn Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Each of you is a shepherd, and each of you is responsible for his flock. The leader who is over the people is a shepherd over them and is responsible for them. The man is a shepherd over his household and is responsible for them. The woman is a shepherd over the house of her husband and his children and is responsible for them. The servant of a man is a shepherd over the wealth of his master and is responsible for it. Verily, each of you is a shepherd, and each of you is responsible for his flock."