anyonyato rājabhiś ca
kṣayaṁ yāsyanti pīḍitāḥ
At the end of the Ninth Canto of Śrīmad-Bhāgavatam, it is stated that Ripuñjaya, or Purañjaya, the first king mentioned in this chapter, ended his rule about one thousand years after the time of Lord Kṛṣṇa. Since Lord Kṛṣṇa appeared approximately five thousand years ago, Purañjaya must have appeared about four thousand years ago. That would mean that Viśvasphūrji, the last king mentioned, would have appeared approximately in the twelfth century of the Christian era.
Modern Western scholars have made the false accusation that Indian religious literature has no sense of chronological history. But the elaborate historical chronology described in this chapter certainly refutes that naive assessment.
Thus end the purports of the humble servants of His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda to the Twelfth Canto, First Chapter, of the Śrīmad-Bhāgavatam, entitled “The Degraded Dynasties of Kali-yuga.”