The Messenger of Allah ﷺ said, "Whenever a man grants property to another for life, for him and his descendants after him, it belongs to the one who was given it and does not return to the one who gave it, because he has made a gift over which the rules of inheritance have taken effect."
حدثنا حجاج بن أبي يعقوب حدثنا يعقوب حدثنا أبي عن صالح عن ابن شهاب بإسناده ومعناه