Is it permissible for children to seek forgiveness for their father who was negligent in praying in congregation?

Question:
May Allah reward you with good, and may He do you good. A listener who referred to his name by the letters A-M says: If my father does not pray all the prayers in the mosque, do we have any obligation? And is it obligatory for us to do something for him, given that he has passed away to the mercy of Allah? May Allah reward you with good.

Answer:
If he prays at home and leaves off the prayer in the mosque without a valid legal excuse, then he is abandoning an obligatory duty; he is abandoning an obligatory duty and commits a sin for that. However, his prayer is valid. It is prescribed for you to seek forgiveness for him, make supplication for him, and give charity on his behalf. Allah will benefit him through that, because this is a sin he commits and an obligatory duty he abandons, for which he is sinful. But seeking forgiveness for him, making supplication for him, and giving charity on his behalf will benefit him if Allah accepts it. Yes.