Bava Batra 136 - A Will of a Healthy Person
When one writes his properties over to his sons for use after death, he must indicate this by including the clause "from today and after death," - says Rabbi Yehudah. But Rabbi Yossi says that it is enough to write "after death," and the date on the document indicates that he means "from today."
In such a case, the father cannot sell the properties completely because they are written over to his son, and the son cannot sell them because they are in the father's possession.
Art: Sorrow by Emile Friant
