Prayer: If a Father Intentionally Abandoned Worship for 50 Years, Must the Eldest Son Perform All His Missed Prayers and Fasts?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: If a Father Intentionally Abandoned Worship for 50 Years, Must the Eldest Son Perform All His Missed Prayers and Fasts?

English:

Question #546:

If a father forsakes all of his worship duties intentionally, will it be obligatory for his eldest son to perform all of the prayers and fasts his father missed over 50 years?

Answer #546:

In this case, it is a caution to perform their qaḍā’ as well.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer