When Lord Kṛṣṇa saw that they were going to fight in the arena of the auspicious Rājasūya-yajña, He personally pacified them. Out of His causeless mercy He Himself decided to kill Śiśupāla. When Śiśupāla was abusing the kings who were about to attack him, Lord Kṛṣṇa took up His disc, as sharp as the blade of a razor, and immediately separated Śiśupāla's head from his body.
When Śiśupāla was thus killed, a great roar and howl went up from the crowd. Taking advantage of that disturbance, the few kings who were supporters of Śiśupāla quickly left the assembly out of fear for their lives. Then the fortunate Śiśupāla's spirit soul immediately merged into the body of Lord Kṛṣṇa in the presence of all, exactly as a burning meteor falls to the surface of the globe. The merging of Śiśupāla's soul into the transcendental body of Kṛṣṇa reminds us of the story of Jaya and Vijaya, who fell to the material world from the Vaikuṇṭha planets upon being cursed by the four Kumāras.