Wages (Kitab Al-Ijarah)
Dawud :: Book 23 : Hadith 3523
Narrated Abdullah ibn Amr ibn al-'As:
A man came to the Prophet (peace_be_upon_him) and said: Apostle of Allah, I have property and children, and my father finishes my property. He replied; You and your property belong to your father; your children come from the pleasantest of what you earn; so enjoy from the earning of your children.