Ata (may Allah have mercy on him) says that Abu al-Sha'tha' (may Allah have mercy on him) used to say regarding the mudabbarah that her children are slaves, like an orchard which you have given in charity (to take effect) after your death: as long as you live, you get its fruit. And Ata (may Allah have mercy on him) says: It is like camels which you give in charity (to take effect) after your death: during your lifetime you get their young and their milk.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المدبر / 21592