12:35 - 2017/12/13
You should orally enjoin your parents to the good and forbid them from evil in a soft language.
Question : How should a son behave towards his parents who do not care about their religious duties due to their lack of complete faith?
Answer: He should orally enjoin them to the good and forbid them from evil in a soft language and with due observance of their respect as parents.
1. Ayatollah Seyyed Ali Khamenei, Practical Laws of Islam, Q1063.