What is the ruling on a man withdrawing a sum of money he deposited into the account of his 10-year-old granddaughter, out of fear that her divorced mother might dispose of it, and spending it on the renovation and maintenance of a mosque?

Scholars differed regarding the permissibility of a donor revoking a gift made to a kinsman. The Hanafis held that revocation is not permissible, while the Shafi'is allowed the father and other ascendants to revoke their gift as long as it remains in the possession of the donee. They cited the hadith: "It is not lawful for a man to give a gift or bestow a present and then take it back, except a father in what he gives to his child." The Malikis allowed only the father and mother to revoke their gifts. The most accurate view is that of the Shafi'is, which includes the revocation by ascendants (such as a grandfather) of a gift to their descendants (such as a granddaughter), as long as the gift remains in the possession of the donee.