The ruling on one who prays in his home due to a mental illness

Question:
A message was sent from Makkah al-Mukarramah by a listener, (S. A.), who says: “I am thirty years old and in good health, praise be to Allah. My father passed away sixteen years ago, and because of his death, I suffered a severe mental condition. As a result, I isolated myself from people and no longer leave the house at all. I am consistent in maintaining the prayer at its times, but I pray at home. My question is: Is it permissible for me to pray at home given the health condition I described? And do I commit a sin if I pray at home? May Allah reward you with good.”

Answer:
It is obligatory for you to pray with the Muslims in the mosques, except for a valid Shari'ah excuse, such as an illness that prevents you from praying. Otherwise, remembering... the death of so-and-so, or the death of your father or someone else, does not prevent you. It is obligatory for you to pray with the Muslims in the mosques. It is prescribed for you to supplicate for your father for forgiveness and mercy, praise be to Allah. And you must repent for what you did, repenting to Allah and feeling remorse. Yes.