An elderly woman who has been deaf and mute since birth, understands by sign, and does not know how to fast or pray: what is the obligation of her children?

Question:
I have an elderly mother who has been deaf and mute since birth, and we only communicate with her by sign. She does not know how to fast or pray. What is the ruling in such a case? And what is my obligation as her eldest son? May Allah reward you with good.

Answer:
In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds, and may Allah send prayers and blessings upon our Prophet Muhammad, his family, and all his Companions. As for what follows, the deaf and mute person learns by sign. Many of this type exist among the Muslims, and they pray and fast, praise be to Allah, and they perform acts of worship through instruction and sign. So you must teach her by sign. The women should pray with her so that she learns. Do not leave her without instruction on the grounds that she cannot hear and that she does not speak. Rather, teach her by sign and by practice, with the women praying with her and repeating it until she learns. Yes.