When Shishupala utters his 101st condemnation, Krishna closes his eyes and his Sudarshana Chakra appears on his finger. Shishupala runs hither and thither, but the Chakra severs his head and returns to Krishna.
Yudhishtra wants to know if killing of Shishupala vitiated the ritual cleanliness of the Yagna. Krishna assure him that Shishupala was his 'dwarapalaka', and it was his wish to oppose Krihna and die at his hands three times. He had previously taken birth as Hiranyakashipu and as Ravana, and in the presnt birth as Shishupala. He has now taken refuge in Krishna as his dwarpalaka, and all sins pertaining to this would touch only Krishna, and Yudhishtra could contine with the ceremonies.