The ruling on giving zakah to a sick sister

Question:
May Allah reward you and bless you. This is a questioner for the program who sent a long message. He says: Honorable Shaykh, may Allah reward you with good. In brief, I am the one who takes care of my father, my mother, and my brother, and I have no financial income. My monthly expenses are approximately four thousand five hundred riyals, covering housing, a domestic worker, and other costs. The question is: my sister is sick, and I take her to private hospitals, and this has been going on for a long time. This hospital charges one hundred riyals per session. I am spending on her from my zakah. Is it permissible for me to pay her from the zakah? For example, if I gave her approximately fifty thousand riyals to spend on her treatment, or she could take what she needs from it, or invest it to receive a monthly return of approximately two hundred riyals. What is the ruling on that?

Answer:
If you are the one covering her expenses and what befalls her, then you are doing a good deed, and this is maintaining family ties. It is obligatory for you to provide for her if you are able to spend on her, because the maintenance of a close relative is obligatory upon their close relative. Based on this, do not give her the zakah, because her maintenance is obligatory upon you, so do not make the zakah a substitute for what is obligatory upon you. This is one aspect. As for the second aspect, if you wish to donate to her without using the zakah, you may donate to her and give her this amount as a donation; there is nothing wrong with that.