SB 10.16.35

Did our husband carefully perform austerities in a previous life, with his mind free of pride and full of respect for others? Is that why You are pleased with him? Or did he in some previous existence carefully execute religious duties with compassion for all living beings, and is that why You, the life of all living beings, are now satisfied with Him? KB 10.16.35 “We are very much astonished to see how You have become so much pleased with this serpent, who evidently performed various religious activities in his past lives that pleased everyone. He must have undergone all kinds of penances and austerities, humbly honored others and executed universal welfare activities for all living creatures.” The Nāgapatnīs confirm that one cannot come in contact with Kṛṣṇa without having executed pious activities in devotional service in his previous lives. As Lord Caitanya advised in His Śikṣāṣṭaka, one has to execute devotional service by humbly chanting the Hare Kṛṣṇa mantra, thinking oneself lower than the straw in the street and not expecting honor for himself but offering all kinds of honor to others. The Nāgapatnīs were astonished that, although Kāliya had the body of a serpent as the result of grievous sinful activities, at the same time he was in contact with the Lord to the extent that the Lord’s lotus feet were touching his hoods. Certainly this was not the result of ordinary pious activities. These two contradictory facts astonished them.