I wrote "waqf for Allah the Exalted" on some books, and then, before I went to the mosque, my mother asked for the books for herself. What is the guidance?

Question:
I wanted to make some of the books I have a waqf (endowment) for Allah the Exalted in one of the mosques, but before I went with them to the mosque, my mother wanted them and told me that she wanted them for herself. So I did not go with them to the mosque and I changed my mind about making them a waqf after I had written on them that they were a waqf. Is that permissible? May Allah reward you with good.

Answer:
If you wrote on them that they are a waqf for the mosque or for others, and you wrote that with the intention of making them a waqf, then they become a waqf. If you specified them for the mosque, then they are restricted and designated for it, and it is not permissible for you to retract that or to dispose of them to other than the mosque. However, if you intended them to be a general waqf and did not specify them for a mosque, but rather intended them as a waqf for those who benefit from them, namely students of knowledge, and your mother is a student of knowledge who needs them and benefits from them, then she is more entitled to them. This is unless you specified them as a waqf for a particular person or for specific students of knowledge, in which case they are designated for those for whom you specified them. If you made them a general waqf for students of knowledge and did not specify an individual, a group, or a place, then your mother may benefit from them, provided that she fits the description.