Hadhrat Mansoor Ali Khan sahib db, a senior murid of Hadhrat Arif-billah Dr. Abdul Hayy and khalifa of Hadhrat Shah Abrarul Haqq sahib (may Allah have mercy on them) adviced an individual;

“Take good care of your father.

His dua (prayers) is accepted for sure. This is stated in sayings of Prophet صلى الله عليه وسلم

In masjid-e-nabawi this Ramadhan, I heard a Syrian Shaykh telling the young aspirants around him that a father’s dua (prayer) for his son is superior to the dua of 70 awliya (friends of Allah SWT) for that individual. This is the case even if the father is not a salih (pious) person.”

Allah SWT give us the tawfeeq. Ameen!