Is the money designated for building an orphanage, of which a part is paid by a female donor, lawful or unlawful if a portion of it is taken for the expenses of the orphans?

The questioner is advised to explain to the donor that she will complete the construction of her house with this money. It is permissible to spend the money on completing the construction of the existing house, even if the donor is unaware, as long as she donated it for the need of housing. However, spending any of the money for another purpose is not permissible except with the donor's permission, because the basic principle is to adhere to the condition of the one who gives charity.