Is it permissible to perform Hajj on behalf of a deceased person who abandoned the prayer?

Question:
May Allah reward you. Yes, the honorable one says: I have an aunt who passed away, and she did not pray. I do not know why she did not pray. Is it permissible for me to perform Hajj on her behalf, perhaps Allah will forgive her?

Answer:
If you know that she abandoned the prayer due to a defect in her intellect, then what can you say about her abandoning it? But if you do not know that she abandoned the prayer for an excuse that prevented her from praying, then do not seek forgiveness for her and do not perform Hajj for her. This is because one who intentionally abandons the prayer is a disbeliever, committing the disbelief that takes one out of the fold of Islam. Unless you know that she was of unsound mind, abandoning the prayer because she had no intellect and no understanding, then there is no harm. This is an excuse for her before Allah the Exalted.