The aunt of Umarah ibn Umayr asked Aisha: I have an orphan in my guardianship. May I enjoy from his property? She said: The Messenger of Allah ﷺ said: The pleasantest things a man enjoys come from what he earns, and his child comes from what he earns.  

أَنَّهَا سَأَلَتْ عَائِشَةَ ؓ فِي حِجْرِي يَتِيمٌ أَفَآكُلُ مِنْ مَالِهِ فَقَالَتْ قَالَ رَسُولُ اللَّهِ ﷺ إِنَّ مِنْ أَطْيَبِ مَا أَكَلَ الرَّجُلُ مِنْ كَسْبِهِ وَوَلَدُهُ مِنْ كَسْبِهِ  

The Prophet ﷺ Said: The children of a man come from what he earns, rather they are his pleasantest earning; so enjoy from their property. Abu Dawud said: Hammad b. Abi Sulaiman added in his version: "When you need." But this (addition) is munkar (not authoritative).  

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ وَلَدُ الرَّجُلِ مِنْ كَسْبِهِ مِنْ أَطْيَبِ كَسْبِهِ فَكُلُوا مِنْ أَمْوَالِهِمْ  

A man came to the Prophet ﷺ and said: Messenger 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.  

أَنَّ رَجُلاً أَتَى النَّبِيَّ ﷺ فَقَالَ يَا رَسُولَ اللَّهِ إِنَّ لِي مَالاً وَوَلَدًا وَإِنَّ وَالِدِي يَجْتَاحُ مَالِي قَالَ أَنْتَ وَمَالُكَ لِوَالِدِكَ إِنَّ أَوْلاَدَكُمْ مِنْ أَطْيَبِ كَسْبِكُمْ فَكُلُوا مِنْ كَسْبِ أَوْلاَدِكُمْ