Is the bequest of two buildings as a waqf for the father and some of the children valid, and is it permissible to divide their proceeds, and does the daughter's share continue for her heirs after her death, and can the handwritten bequest be revoked?

The endowment is valid if it occurred during the endower's lifetime and while he was of sound mind, and if it was taken possession of before his death. It is not permissible to revoke it. Its proceeds are to be distributed among the beneficiaries as stipulated by the endower; if he did not stipulate, then equally. The share of any deceased beneficiary ceases and reverts to the people of the endowment (the endower's children and their offspring). The children of the daughter are included in "the offspring." The endowment of an apartment to the mother and sister for their lifetime is valid and is akin to a life estate (umra). After their death, it reverts to the father's heirs, as of the day of his death.