Do the grandchildren designated in the waqf have a share in the waqf bequest, or is their share limited to movable and immovable property that can be divided and sold, and what is their total share of the inheritance?

The inheritance of the deceased is to be divided among his sons and daughters by way of ta'sib (residuary heirship), with the male receiving the share of two females, based on the Almighty's saying: {Allah instructs you concerning your children: for the male, what is equal to the share of two females}. If there is a will for non-inheriting grandchildren, and it means their father's share had he been alive, then it is a valid will and shall be acted upon. As for waqf (endowment), it follows the condition of the endower. If he specified particular individuals and did not mention the grandchildren, then they are not included. If he specified them, they are included. If he specified them with general descriptions, they are not included unless the description applies to them. It is necessary to consult the Sharia (definition) courts in matters of inheritance to achieve justice and protect rights.