The story of the fall of Jaya and Vijaya from the Vaikuṇṭha planets to the material world is described in the Seventh Canto of Śrīmad-Bhāgavatam. The killing of Śiśupāla has a direct link with that narration of Jaya and Vijaya, but the most important instruction we get from this incident is that the Supreme Personality of Godhead, being absolute, can give salvation to everyone, whether one acts as His enemy or as His friend. It is therefore a misconception that the Lord acts with someone in relationship of friend and with someone else in the relationship of enemy. His being an enemy or friend is always on the absolute platform. There is no material distinction.
After King Yudhiṣṭhira took his bath at the conclusion of the sacrifice and stood in the midst of all the learned sages and brāhmaṇas, he seemed exactly like the King of heaven and thus looked very beautiful. King Yudhiṣṭhira sufficiently rewarded all the demigods who participated in the yajña, and, being greatly satisfied, all of them left, praising the King’s activities and glorifying Lord Kṛṣṇa.
When Śukadeva Gosvāmī narrated these incidents of Kṛṣṇa’s killing Śiśupāla and described the successful execution of the Rājasūya-yajña by Mahārāja Yudhiṣṭhira, he also pointed out that after the successful termination of the yajña only one person was unhappy. He was Duryodhana. Duryodhana by nature was very envious because of his sinful life, and he appeared in the dynasty of the Kurus like a chronic disease personified to destroy the whole family.
Śukadeva Gosvāmī assured Mahārāja Parīkṣit that the pastimes of Lord Kṛṣṇa—the killing of Śiśupāla and Jarāsandha and the releasing of the imprisoned kings—are all transcendental vibrations, and that anyone who hears these narrations from authorized persons will immediately be freed from all the reactions of the sinful activities of his life.