Mansur narrated from Ibrahim (may Allah have mercy on him): If a man makes a bequest (of more than one-third) and his heirs are present and acknowledge it, what is the ruling? Ibrahim (may Allah have mercy on him) said: (Such a bequest) is not permissible. Imam Darimi (may Allah have mercy on him) said: This means that if they later dislike it, then such a bequest will not be executed.