What should a daughter do whose father, a once-devout man, abandoned prayer and the Quran at the age of seventy, and she is concerned about his end and tries to advise him without success?

The questioner and her siblings must continue to pray for their father and try to persuade him to return to God and commit to prayer. They should also show him what the scholars say about the ruling on abandoning prayer, if he is of sound mind. However, if he is afflicted with dementia, then he is not held accountable.