(Prahlad Maharaj prays to Lord Nrsimhadeva)
"Prahlāda Mahārāja was thinking that 'My father was so sinful, so much against God consciousness, he might not be liberated.' So therefore Prahlāda Mahārāja, when he was requested..., when he was, rather, offered any benediction he wanted to take from Nṛsiṁha-deva, he refused: 'My dear Lord, please do not induce me in that way. I am born in a family, demonic family. To gain some material profit is my natural propensity. And You are the offerer. You are offering me. I can take anything from You. But this is not my business. Because I have rendered service to You, it does not mean that I will take some remuneration for You. This is business.' Vaṇik. Sa vai vaṇik: 'This is mercantile man's... But I am Your eternal servant. I do not expect any reward from You.' But that Prahlāda Mahārāja, later on he asked Nṛsiṁha-deva, 'My dear Lord, one thing I may ask from You.' 'What is that?' 'Now, my father was atheist number one, and he has committed so many offenses at Your lotus feet. Now he is killed. So I want that he may be excused and given liberation.' So he was already liberated. Still, as affectionate son, he was anxious to know, 'Whether my father will be liberated or not?' So this was confirmed by the Lord: 'Not only your father—his father's father, his father, his father, up to fourteen generations—everyone is liberated, because a Vaiṣṇava son like you is born in this family.'
So my point is: by serving the Supreme Lord, one gives the best service to the family, because if one becomes a Vaiṣṇava, pure Vaiṣṇava, the whole family, up to fourteen generation, they become liberated. Therefore tīvreṇa bhakti-yogena. We should not divert our attention for any other service. We should simply concentrate for rendering service to the Supreme Lord. This is the conclusion. Tīvreṇa bhakti-yogena mano mayy arpitam. Mayi, 'unto Me, the Supreme Lord, Kṛṣṇa.' This is Kṛṣṇa consciousness. Always thinking of Kṛṣṇa, mayi. That will help."
(Srila Prabhupada Lecture, Bombay, December 12, 1974)